Answer:
The value of x is 3.
Explanation:
5x-7=y
5x-7=8
5x=8+7
5x=15
x=15/5
x=3
To get that answer, we replace y with 8 and then isolate x.
5x-7 = y
5x-7 = 8
5x = 8+7
5x = 15
x = 15/5
x = 3
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