Answer:
x = 3
Explanation:
18 = 7 + 4(x - 1)
18 = 7 + 5x - 4
18 = 3 + 5x
15 = 5x
x=3
7+4(5/4x-1)=18
7+5x-4=18
3+5x=18
5x=15
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