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(1/2)*(3*x-7) = 4 // - 4
(1/2)*(3*x-7)-4 = 0
1/2*(3*x-7)-4 = 0
1/2*(3*x-7)-4 = 0
3/2*x-15/2 = 0
3/2*x-15/2 = 0
3/2*x-15/2 = 0 // + 15/2
3/2*x = 15/2 // : 3/2
x = 15/2/3/2
x = 5
x = 5
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