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maddi25
maddi25 maddi25
  • 27-02-2017
  • Mathematics
Answered

Y=-x+7

Y=2x-2


And then the second problem is



Y-1=2x

Y+2x=5


They are substitutional problems! Please show work it's greatly appreciated!

Verified Answer :

21cooperx
21cooperx 21cooperx
  • 27-02-2017

Question 1:
y=-x+7
y=2x-2

(-x+7)=2x-2
-x+7+x=2x-2+x
7=2x-2+x
7+2=2x-2+x+2
9=3x
9/3=3x/3
3=x

y=-x+7
y=-(3)+7
y=4

Question 2:
y-1=2x
y+2x=5

y-1=2x
y-1+1=2x+1
y=2x

(2x+1)+2x=5
2x+1+2x=5
4x+1=5
4x+1-1=5-1
4x=4
4x/4=4/4
x=1

y-1=2(1)
y-1+1=2+1
y=3

Answer: x=1 y=3

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