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Anonymous
5x - 8 = 7
Add 8 to both sides
5x = 15
Divide both sides by 5
x = 3
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If 5x + 8 = -7 then x = -3 ! -3 x 5 = -15 -15 + 8 = -7 !
5x=4012y=84124
The answer is -8.
If: 3x+8-x = 5x-4 Then: x = 4
5x+y=-7 3x+y=15 8=D