x/5-7=2q for x

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x/5-7=2q for x

Add 7 to each side:
x/5 -7 + 7 = 2q + 7

Cancel the 7's on the left side, we get:
x/5 = 2q + 7

Cross multiply the 5:
x = 5(2q + 7)
x = 10q + 35