Answer:
X = 35
Explanation:
5 + 100 = 7x + 30
5x + 100 - 100 = 7x + 30 - 100
5x = 7x - 70
5x - 7x = 7x - 70 - 7x
-2x = -70
-2x/-2 = -70/-2
x = 35
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