2x-y=-4
-3x+y=-9
the answer is y=13 and x=30
show steps please

Question

2x-y=-4
-3x+y=-9
the answer is y=13 and x=30
show steps please

jackellyn · Answer

Solve for y in the first equation

2x -y = -4
-y = -4 -2x
y= 4+2x

Substitute into second equation
-3x+(4+2x) = -9
Simplify/Combine like terms/Solve for x
-3x +4 +2x =-9
-x +4 =-9
-x = -13
x=13

Substitute x=13 into first equation to find y
2(13)-y =-4
Simplify and solve for y
26 -y = -4
-y = -4-26
y =30

jackellyn · Answer

I got opposite answers.

anonymous · Answer

i probully did it wrong how would you do a check step for this?

jackellyn · Answer

if you substitute the value you got for x and y in either equation they should equal the number it says.

for example:
2(13)-30=-4
26-30 =-4
-4=-4

anonymous · Answer

sweeet thank you

jackellyn · Answer

no problem :)