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3*(x-7)+5 = (1/2)*(2-x) // - (1/2)*(2-x)
3*(x-7)-((1/2)*(2-x))+5 = 0
3*(x-7)+(-1/2)*(2-x)+5 = 0
3*(x-7)-1/2*(2-x)+5 = 0
3*(x-7)-1/2*(2-x)+5 = 0
7/2*x-22+5 = 0
7/2*x-17 = 0
7/2*x-17 = 0
7/2*x-17 = 0 // + 17
7/2*x = 17 // : 7/2
x = 17/7/2
x = 34/7
x = 34/7
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