Questions on Algebra: Systems of Linear Equations answered by real tutors!

Tutors Answer Your Questions about Linear-systems (FREE)

Question 465551: Solve using any method. (x/2) + (y/3) = 2/3 and (x/5) + (5y/2) = 1/4
I cannot figure out how to do this problem I have been working on it for an hour and have not figured it out please help.
Click here to see answer by ewatrrr(10682)

Question 465956: 8x-12y-7x-8y+6-7x-2x+5y
Click here to see answer by sofiyac(695)

Question 466055: 3x + 2y = 2 -2x + y = 8
Click here to see answer by algebrahouse.com(1079)

Question 466023: If the ordinate equals the abscissa and x {-3, 0, 12}, which of the following sets of ordered pairs satisfies the given conditions?
{(3, -3), (0, 0), (-12, 12)}
{(-3, 3), (0, 0), (12, -12)}
{(-3, -3), (0, 0), (12, 12)}
Click here to see answer by ewatrrr(10682)

Question 466022: 15x+11y= 132
2x+3y=59
Click here to see answer by Alan3354(30993)

Question 466181: Solve the system of equations
{ y = x + 1
{ y = -4x + 11
---------------
x, y ( , )
Thanks!
Click here to see answer by asuar010(324)

Question 466169: Joe orders an 8 ounce martini that is 4.7% vermouth. sue orders an 8 ounce martini that is 100% gin. a martini is made with gin and vermouth. Joe and Sue give the drinks to Jane. Jane would like to mix a portion of each drink, so that she has an 8 ounce martini that is 99.8% gin. How much does Jane use of each drink?
Click here to see answer by ankor@dixie-net.com(15649)

Question 466358: 5 years ago, john age was half of the age he will be in 8 years.how old is he now

Click here to see answer by jorel1380(2518)

Question 466401: I can't seem to get this... any help would be appreciated...
Classify the function as a linear, quadratic, or exponential.

f(x) = (x - 2)(x + 6)

A)

Linear

B)

Quadratic

C)

Exponential

Click here to see answer by Theo(3458)

Question 466756: Solve using the substitution method. Show your work. If the system has no solution or an infinite number of solutions, state this.-8x – 4y = -68x + 3y = 16
I forgot how to do this...please help..
Click here to see answer by Alan3354(30993)

Question 466767: Use a Graphing calculator to solve the system:
√3x - y = 5
5x + y = 7
(The answer must be an ordered pair/ this symbol √ is suppose to be a square root)
Click here to see answer by ccs2011(207)

Question 466770: 4x + 3y + z = 25
x - 3y + 2z = -9
11x - 2y + 3z = 18
write solution as an ordered triple
Click here to see answer by Ryan O'Hara(46)

Question 466769: x + y + z = -2
2x + 5y + 2z = -16
-x + 8y - 3z = -44
(answer must be a ordered triple)
Click here to see answer by Ryan O'Hara(46)

Question 466857: Hello,
I have a question on solving linear equations. My answer is 4. I would to see if my answer is correct.
1/2(x+2) + 3/4(x + 4) = x + 5
Please let me know what you get.
Thank you
Click here to see answer by stanbon(57307)

Question 466908: Construction. Public buildings regularly include steps with 7-in. risers and 11-in. treads. Find the grade of such a stairway.

Click here to see answer by stanbon(57307)

Question 466968: i can't under stand if 3x+2y = -17
2x-5y = 14 the what is the process i can't under stand
what i need is Ex:
this i understand
X+2y=5
y=2x
X+2y=5
x+2(2x)= 5
x+4x=5
x+ 4= 5
5x and 5 divided by 5 y = 1 that i under stand but below i don't get it

THIS!!

Explanation:

Solving:
3x+2y = -17
2x-5y = 14

Using Substitution Method.
Expressing x as a function of y (from the first equation) x = (-17 -2y)/3
Substituting this expression into the second equation:
2(-17+2y)/3-5y = 14
Simplifying this expression:
(-19)y = 76
or
y = -4
Now, substituting y = -4 back into the x expressed as a function of y:
x = (-17-2y)/3 = -3

Click here to see answer by rfer(12657)

Question 466976: Post your 50-word response to the following: How can you determine if two lines are perpendicular
Click here to see answer by hhlebiczki(1)

Question 468075: y=-x+3
y=x+1
Click here to see answer by edjones(7569)

Question 468108: solve:
3x-4y=26
{
x-8y=22
Click here to see answer by ewatrrr(10682)

Question 468107: solve:
2x+3y=7
x+y=3
Click here to see answer by ewatrrr(10682)

Question 468082: i am having trouble solving equations. where can i get help to make them seem simple

Click here to see answer by rfer(12657)

Question 468205: i need help to simplify the linear system
Click here to see answer by Alan3354(30993)

Question 468361: I am trying to figure out how to solve this problem using the substitution method. I know that it equals 1000, but I can't figure out how to show the proper work. Any help of guidance would be appreciated. Thank you.
60+.20(x-550)=120+.15(x-800)
Click here to see answer by ewatrrr(10682)

Question 468728: what are the X and y values(in whole numbers) of the equations y=-5/7x-11/7 and y=-1/3x+5/6
Click here to see answer by jorel1380(2518)

Question 468677: two types of candy sell for $2.50 per pound and $4.00 per pound. A store clerk is trying to make a 5 pound mixture worth 17.60. How much of each type of candy should be included in the mixture?
Click here to see answer by mananth(12270)

Question 468927: How do you do this problem?
Minimize: Z = 6x+15y
Subject to: 4x+5y>=27; 8x+4y>=32; x>=0;y>=0
It's wanting to know the minimum value of Z and what point it occurs at.
I can't figure out how to solve this. Thanks.
Click here to see answer by stanbon(57307)

Question 468975: How do I minimize: z=13x+9y
subject to: 3x+4y>=21; 8x+4y>=32; x>=0; y>=0 ?
Click here to see answer by ccs2011(207)

Question 469016: Solve the system by substitution:
-3x+6y=21
2x-4y=14
I have tryed completing this by making the -3x+6y=21 into an x=2y-7.
Then I got 2(2y-7)-4y=14 which turns into 4y-14-4y=14 and then -14=14.
If this problem is not possible, then what do I write as an answer??
Thank you so so so so so so much! (:
Click here to see answer by jim_thompson5910(28593)

Question 469164: solve the equation. Check the solution.
1-(x-3)=6+2x
Click here to see answer by MathLover1(6627)

Question 469501: two executive in cities 300 mi apart drive to a business meeting at a location between their cities. they met after 4 hours. find the speed of each car if one travels 20 miles per hour faster than the other
Click here to see answer by amoresroy(333)

Question 469646: I am having a hard time understanding how to write the slope-intercept form to 13x-11y=-12
Can someone help with breaking it down for me?
Thanks
Click here to see answer by Tatiana_Stebko(1326)

Question 469689: i need help solving 5x-2+3(x-11) =5 using distributive property
Click here to see answer by rfer(12657)

Question 469893: Marks: 2
Solve the system of equations by the best way you think is possible. Put the answer in an ordered pair.
2x - 6y = 6
2x + 3y = 24
Click here to see answer by sofiyac(695)

Question 469893: Marks: 2
Solve the system of equations by the best way you think is possible. Put the answer in an ordered pair.
2x - 6y = 6
2x + 3y = 24
Click here to see answer by ewatrrr(10682)

Question 469870: How do I check if this answer is really correct in elimination method.
1.) 3x - 2y = 6 SS={(4,3)}
5x + 7y = 41
2.) 5x - 2y = 8 SS={(2,1)}
3x - 5y = 1
Click here to see answer by Edwin McCravy(8908)

Question 470023: 6x+5y=7x+3y+1=2(x+6y-1)
Click here to see answer by sofiyac(695)

Question 470198: Solve this system using substitution: y=1/3x+10 x=3y+6
Click here to see answer by Tatiana_Stebko(1326)

Question 470387: In the following system of equations, what does y equal?
10x+9y=3
8x+y=6
Click here to see answer by sofiyac(695)

Question 470644: what is 6x+4y+5z-4x+2z-7y= ?
Click here to see answer by sofiyac(695)

Question 470908: Two minor league baseball players got a total of 298 hits. washington had 10 more hits than sanchez. Find the number of hits for each player
Click here to see answer by ewatrrr(10682)

Question 470920: write a system of linear equation whose solution gives the number of each type of room rented. when ten rooms are rented at the rates of $80 and $120 pernight. The total collected of the 10 rooms is $920.
Click here to see answer by ptaylor(2048)

Question 471019: Take out the GCF:
13x to the 2nd yz plus 169xy to the 2nd z to the 2nd minus 39xyz to the 3rd
Click here to see answer by algebrahouse.com(1079)

Question 471094: rental car costs $25 per day plus
$0.20 per mile. If someone has $200 to spend and
needs to drive the car 90 miles each day, for how
many days can that person rent the car?
Click here to see answer by josmiceli(9671)

Question 471345: using substution mehhod [x+2y=11]
[2x-y=2
Click here to see answer by algebrahouse.com(1079)

Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845