SOLUTION: how do you solve this.. x+2y=5 solve each system of equation x-y=-1

Question 661567: how do you solve this.. x+2y=5 solve each system of equation
x-y=-1
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
x + 2y = 5
x - y = -1
Subtract the equations
x - x + 2y - -y = 5 - -1
3y = 6
3y/3 = 6/3
y = 2
Multiply second eqution by 2
2(x-y=-1)
2x-2y=-2
Add to the first equation
x +2x +2y + -2y = 5 + -2
3x = 3
3x/3=3/3
x=1
Therefore,
x=1, y = 2
Proof
1 + 2(2) = 5
1-2=-1
RELATED QUESTIONS
How do you solve this system of equations: y=3x+1 x+2y=-5 (answered by rfer)

How do you solve each system by graphing. 1. x+2y=10 (answered by mananth)

how do you solve this system of equation: x^2+y^2=36... (answered by fractalier)

How do you solve this equation by substitution {{{system(2x +... (answered by Edwin McCravy)

How do I solve this non-linear system of equation? 6x^2+y^2=1... (answered by ankor@dixie-net.com)

how do you solve this system of equation x+y=8... (answered by nerdybill)

How do you solve this system of equations: 2x + 3y = 9 x - 2y = 1 (answered by rfer)

How do you solve this three-variable system? {x+2y+z=4 {2x-y+4z=-8... (answered by Alan3354)

How do you solve this for a system equation y= -x y=... (answered by fcabanski)