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

Tutors Answer Your Questions about Linear-systems (FREE)

Question 341136: Solve the systems of equations by graphimg. Then classify the system.
7u+v=48
7u=v+64
Click here to see answer by edjones(7569)

Question 341230: -2|(-3*4)-6|
Click here to see answer by edjones(7569)

Question 341223: 2x -2y = -8
4x + 3y = 5
Click here to see answer by Fombitz(13828)

Question 341333: 18-(2a-5)-2(a+2)=3a+5
Click here to see answer by rfer(12730)

Question 340960: for the following equation, state the value of the discriminant and then describe the nature of the solutions.
-3x^2-9x-5=0
The equation has one or two real solutions?
Click here to see answer by Fombitz(13828)

Question 341064: I am not sure what to do on this one
3(x-0.87)-2x=4.98
Click here to see answer by Fombitz(13828)

Question 341759: how to find the equation that passes through these two points (2,4)and (-3,14)
Click here to see answer by Alan3354(31532)

Question 341841: A mother is three times as old as her daughter. Nine years ago, she was six times as old a her daughter. Find the present age of each.
Click here to see answer by josmiceli(9817)

Question 341869: how to get the answer of the following?
1.) The perimeter of an isosceles triangle is 36 cm. The total length of the two congruent legs is 12 centimeters more than one half the length of the base. Find the lengths of the three sides.
Click here to see answer by mananth(12270)

Question 342095: Linear systems
Solve systems invovling 3 equations in 3 variables
3x + y + z = 0
2x - y + z = 0
2x + y + z = 0

Click here to see answer by Alan3354(31532)

Question 342203: 2x + y + 6x + 8 = 90
Click here to see answer by Fombitz(13828)

Question 342379: Suppose Bob owns 2,000 shares of Company X and 10,000 shares of Company Y. The total value of Bob's holdings of these two companies is $372,000.
Suppose Frank owns 8,000 shares of Company X and 6,000 shares of Company Y. The total value of Franks holdings of these two companies is $400,000.
a. Write equations for Bob and Frank's holdings. Use the variables X and Y to represent the values of shares of Company X and Company Y.
b. Solve for the value of a share of Company X and Company Y. Show your work so you can get partial credit even if your final answer is wrong.

Click here to see answer by jrfrunner(365)

Question 342380: 3. Solve for X, Y, and Z in the following systems of three equations using either substition or elimination methods:
a. X + 2Y + Z = 22
X + Y = 15
3X + Y + Z = 37
b. 10X + Y + Z = 603
8X + 2Y + Z = 603
20X - 10Y - 2Z = -6
c. 22X + 5Y + 7Z = 12
10X + 3Y + 2Z = 5
9X + 2Y + 12Z = 14

Click here to see answer by Edwin McCravy(8999)

Question 342378: Solve for X and Y in the following problems using either substitution or elimination methods. Make sure you show all your work so you can get partial credit even if your final answer is wrong.
a. X + Y = 10 , 3X + Y = 12
b. 2X + 5Y = 19 , 3X + 3Y = 15
c. 4X + Y = 22 , 2X + 3Y = 16
d. 12X + Y = 174 , 8X - 2Y = 36

Click here to see answer by Alan3354(31532)

Question 342440: which equation represents a straight line 4x^2+9y^2=25, 2xy+6=15y, 3y-2x=7
Click here to see answer by Fombitz(13828)

Question 342078: what is the system by substitution answer to this problem
2x + y = 3
y = 5x - 11

Click here to see answer by Fombitz(13828)

Question 342636: Saidhari bought a toaster oven for $60. This price was 1/4 off the list price. What was the list price?
Click here to see answer by user_dude2008(1861)

Question 342881: IQ=100M/C SOLVE FOR M

CAN YOU PLEASE EXPLAIN HOW TO DO THIS KIND OF PROBLEM
THANK YOU

Click here to see answer by nyc_function(2733)

Question 342016: solve the system of linear equations x/3+6y=4 and y=-5-x
Click here to see answer by Fombitz(13828)

Question 343219: my problem is
in any triangle the sum of the measures of the angles is 180 degrees. In triangle ABC, angle A is four times as large as angle B. Angle C measures 20 degrees less than angle B. Find the measure of each angle.
we are suposed to turn it into an equation find an angle then solve the problem from there. i cannot think of an equation.
i have tried:
180= 4X+X-20
and other equations but none work
thank you for helping me!
Click here to see answer by mananth(12270)

Question 342806: A lady went for shopping and spent half of what she had on buying hankies and gave a rupee to a begger waiting outside the shop.She spent half of what was left on a lunch and followed with a two rupee tip.She spent half of the remaining amont on a book and three rupees on bus fare.When she reached home , she found that she had exactly one rupee left.How much money did she start with?
Click here to see answer by ankor@dixie-net.com(15746)

Question 343224: my problem is:
the sum of 3 numbers is 123. the second number is 9 less than two times the first number. the third number is 6 more than three times the first number. find the three number.
we are suppoed to make and equation and solve from there but i am not good at making an equations. i have tried to make many but none work.
thank you for helping me!
Click here to see answer by edjones(7569)

Question 343339: I have been working on this problem for over a half hour.
1/4+1/6=1/x
I have tried LCD which I know you are supposed to do which is twelve. I got to where 1/4=3 and 1/6=2 but I don't know what to do for 1/x.
So what I have is 3+2=1/x, what do I do next?
Click here to see answer by haileytucki(390)

Question 343378: x=y-2z
2y=x+3z+1
z=2y-2x-3
use substitution method pls
Click here to see answer by stanbon(57967)

Question 343551: ok i have math hw and one of the problems says this X+(-9)+9=8
the next problem says X+(-2.8)+9.2=0 i dont understand how to do these kinds of problems and we don't have the right textbook ?????
Click here to see answer by Alan3354(31532)

Question 343556: how to solve 3x-y=9 and 7x+2y=1
Click here to see answer by checkley77(12569)

Question 343930: Susan has a number of dimes and quarters in her pocket.
She has a total of 84 coins, and the total dollar value of all dimes and quarters is $15.
Write two equations, using variables “d” and “q” to represent the number of dimes and quarters Susan has.
Solve those two equations using either the substitution or elimination method to find how many dimes and how many quarters she has.
Click here to see answer by Fombitz(13828)

Question 343950: please help me with solve this equation what is the solution set 8x-7=19x+15
Click here to see answer by Jk22(389)

Question 344016: x-y=1
6x-5y=11
Click here to see answer by Fombitz(13828)

Question 343884:
Click here to see answer by CharlesG2(828)

Question 344051: I bought 10 lbs. of Stayman apples and x lbs. of golden delicious apples at the orchard. What was the combined weight of the apples?

Click here to see answer by Fombitz(13828)

Question 344404: Find the equation of the line through pair of points (4,0) and (-8,5). Write equation on Ax +By = C form
Click here to see answer by Alan3354(31532)

Question 344629: does y=2x-61 and y=-2x-66 intersect? if so where?
Click here to see answer by Fombitz(13828)

Question 344688: 3X-5Y=-9
5X-6Y=-8
Click here to see answer by Jk22(389)

Question 344752: write an equation for the line with the slope 3 going through the point (1, -2)
Click here to see answer by ewatrrr(10682)

Question 344714: the question is:
Your piggy bank has a total of 47 coins in it; some are dimes and some are nickels. If you have a total of $3.95, how many nickels and how many dimes do you have? Show all of your work to receive full credit.
I tried for at least 20 min and only got this,
d+n=47
-d -d
.10d+.05n=3.95
n=d+47
.10d+.05(d+47)=3.95
.10d+.05d+2.35=3.95
.15d+2.35=3.95
-2.35 -2.35
.15d=1.6
/.15 /.15
d=10.66
Click here to see answer by ankor@dixie-net.com(15746)

Question 344753: write an equation for the line going through the point (3,2)and (-2, 4)
Click here to see answer by ewatrrr(10682)

Question 344824: can you show me how to work this problem out step by step.
2/5x + 6 = 2/3x+10
Click here to see answer by ewatrrr(10682)

Question 344824: can you show me how to work this problem out step by step.
2/5x + 6 = 2/3x+10
Click here to see answer by stanbon(57967)

Question 344873: solve -6y+7=-7y+6
Click here to see answer by rfer(12730)

Question 344759: solve th esystem of equations using the elimination method.(can you show all steps)
5x+y-z=6
x+y+z=2
3x+y=4
Click here to see answer by ankor@dixie-net.com(15746)

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