SOLUTION: 2x+4y=-3
2x-y=7
y=2x-7
2x+4y=-3
2x+4(2x-7)=-3
2x+8x-28=-3 can you show me step by step please? their answer was 5/2,-2?
Algebra ->
Expressions-with-variables
-> SOLUTION: 2x+4y=-3
2x-y=7
y=2x-7
2x+4y=-3
2x+4(2x-7)=-3
2x+8x-28=-3 can you show me step by step please? their answer was 5/2,-2?
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Question 585111: 2x+4y=-3
2x-y=7
y=2x-7
2x+4y=-3
2x+4(2x-7)=-3
2x+8x-28=-3 can you show me step by step please? their answer was 5/2,-2? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! So far so good.
Keep going.
2x+8x-28=-3
combine
10x=25
x=25/10
x=5/2
plug 5/2 for x in either equation
2*(5/2)-y=7
5-y=7
subtract 7 from both sides
-2-y=0
add y to both sides
-2=y
