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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 448421: -2x+3y=14
x-4y=-12
Click here to see answer by mananth(12270)

Question 448439: elimination / addition
x + 5y = 7
-x + 7y = 17
Click here to see answer by richard1234(5390)

Question 448566: how do you solve y=4x+2 and y=3x+6 step by step?
Click here to see answer by ewatrrr(10682)

Question 448638: which equation reresents a line parallel to the line whose equation is 2y-5x=10
a.) 5y-2x=25
b.) 5y+2x=10
c.) 4y-10x=12
d.) 2y=10x=8
please & THANK YOU! (:
Click here to see answer by scott8148(6628)

Question 448917: What I need is a thorough laymens term on how to solve this math.
Determine whether the point (7,2) is a solution of the system
-3x+4y=-13
-2x+8y=2
by substituting the point into each equation?
Thank you so much
Click here to see answer by stanbon(57969)

Question 449108: I have to solve by substitution. Clear fractions first.
1/5x+1/5y=1
1/5x-1/5y=9/5
I keep getting the wrong answer.
Click here to see answer by Leaf W.(97)

Question 449380: I need help with this question please:
Solve the system of equations
x + y = 5
x - y = -9
Click here to see answer by Math_Teacher_37(4)

Question 449380: I need help with this question please:
Solve the system of equations
x + y = 5
x - y = -9
Click here to see answer by nerdybill(7008)

Question 449400: elimination/ addition
a - 2b = 7
3a - 2b = 9
with steps too
Click here to see answer by solver15(27)

Question 449414: elimination/ addtion method
x - 3y = 4
x + 5y = -4
Click here to see answer by solver15(27)

Question 449397: elimination/addition
a - 3b = 4
a + 5b = -4
with steps too
Click here to see answer by solver15(27)

Question 449471: x+7y = 3 (1)
x=9-7y (2)
Solve the system of equations, is there a solution?
Click here to see answer by aagam94(6)

Question 449483: wat is y to the second power minus seven y plus four

y scuared-7y+4 when y =-3
Click here to see answer by edjones(7569)

Question 449441: solve by using elimiation/addtion
2m - 5n = 13
5m + 3n = 17
show steps
Click here to see answer by mananth(12270)

Question 449438: solve elimination/addtion method
2c - 3d = 14
5c - 6d = 32
show steps
Click here to see answer by mananth(12270)

Question 449398: elimination / addition

-5x - 3y = -14
5x - 6y = 32
with steps too
Click here to see answer by mananth(12270)

Question 449402: elimination/ addition
3x + y = 7
x + 2y = 4
with steps too
Click here to see answer by mananth(12270)

Question 449742: y=2x^2,y=x+3 solve using system of equations algebraically.
Click here to see answer by Math_Teacher_37(4)

Question 449814: y=7-x;y^2+x^2=9 solve using system of equations algebraically.
Click here to see answer by robertb(4012)

Question 449859: 4y + x = 3
2x + 8y = 5
Click here to see answer by oberobic(2304)

Question 450021: I need to know how to solve this by substitution.
x=y-6
2x+3y=33
Click here to see answer by nerdybill(7008)

Question 450372: solve by elimination
3k + 7m = 16
4k - 3m = 9
Click here to see answer by mananth(12270)

Question 450364: solve by elimination
2c - 3d = 14
5c - 6d = 32
Click here to see answer by stanbon(57969)

Question 450371: solve by elimination
4x + 4y = 5
2x - 8y = -5
Click here to see answer by mananth(12270)

Question 450454: q=a+b+c. solve for a
Click here to see answer by algebrahouse.com(1079)

Question 450875: five-sixths of a number is-60. What is the number?
Click here to see answer by jorel1380(2518)

Question 450936: I am having a hard time figuring out (a).. I have no idea how to set it up and solve- any help would be much appreciated!!!!

In 2004, there were an estimated 39 million HIV infections worldwide with an annual infection rate of 4.9 million.

a. Find the slope intersect form of a line that approximates the cumulative number of HIV infections in million during year X, where X ≥ 2004.
b. Estimate the number of HIV infections in 2010.
Click here to see answer by jorel1380(2518)

Question 450366: solve by elimination
a - 2b = -3
-2a + 4b = 6
Click here to see answer by robertb(4012)

Question 451252: 2. -8x-3y=69
8x+7y=-65
how do you solve step by step to find the two points
Click here to see answer by Alan3354(31532)

Question 451252: 2. -8x-3y=69
8x+7y=-65
how do you solve step by step to find the two points
Click here to see answer by htmentor(809)

Question 450732: which of the following is the solution to the equation 2(x-10)=3x-4?
a.) 1
b.) -1
c.) -6
d.) -16
Click here to see answer by Edwin McCravy(8999)

Question 451494: Please help. I need to find four solutions of the equation. Write the solutions as ordered pairs..y=-3x-6 Multiple choice start with (-4,6) Thank you.
Click here to see answer by stanbon(57969)

Question 451552: 2x+3y=10 , find the value of x and y.
Click here to see answer by confusedgirl81(14)

Question 451640: what is the answer to this problem:
2x-3y+2z=3
2y-3z=-6
z=4

Click here to see answer by ewatrrr(10682)

Question 451662: Consider the following formula: y=3(x+5)(x-2)
Which of the following formulas is equivalent to this one?
(2) means square. (I did not know how to make the computer make the 2 square)
A. y=3x(2)+9x-30
B. y=3x(2)+3x-10
C. y=3x(2)+3x-30
D. y=3x(2)+3x-30
Click here to see answer by ewatrrr(10682)

Question 451710: What type of solution does the following linear system have?
Click here to see answer by ewatrrr(10682)

Question 451781: A cycle shop sells bicycles and tricycles. The number of bicycles is 1 less than 4 times the numberm of tricycles. All the bicycles and tricycles together have 174 wheels. How many bicycles are there?
Click here to see answer by pedjajov(51)

Question 452229: x-y=-9
Click here to see answer by Alan3354(31532)

Question 452201: Solve the following system of equations.
x+2y=5
x=8-2y

What is the solution of the system. Type an ordered pair.
Click here to see answer by rwm(914)

Question 452310: Solve by substitution.
6m+n=52
m-5n=19
Thank you,
Missy
Click here to see answer by Alan3354(31532)

Question 452308: Solve by substitution method.
5x-8y=9
9x+91=y
Thank you,
Missy
Click here to see answer by Alan3354(31532)

Question 452313: Soybean meal is 14% protein; cornmeal is 7% protein. How many pounds of each should be mixed together in order to get 280lb mixture that is 13% protein?
How many pounds of the cornmeal should be in mixture?
How many pounds of the soybean meal should be in mixture?
Thank you,
Missy
Click here to see answer by ankor@dixie-net.com(15746)

Question 452320: 0.3x-0.2y=4
0.2x+0.3y=-37/17
Solve by elimination.
Thank you,
Missy
Click here to see answer by ankor@dixie-net.com(15746)

Question 436488: Lifting weights can increase a
person’s muscle mass. Each additional pound of
muscle burns an extra 40 calories per day. Write a
linear function that models the number of calories
burned each day by x pounds of muscle. By burning
an extra 3500 calories a person can lose
1 pound of fat. How many pounds of muscle are
needed to burn 1 pound of fat in 30 days?
I have the formula of : f(x)= ax + b
I am not sure where to start?
Click here to see answer by ebmcalle(1)

Question 452978: one canned juice drink is 15% orange juice; another is 5% orange juice. How many liters of each should be mixed together in order to get 10L that is 7% orange juice?
Click here to see answer by mananth(12270)

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, 10846..10890