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3*((1/2)*x+3.5)-2*x = 14 // - 14
3*((1/2)*x+3.5)-2*x-14 = 0
3*(1/2*x+3.5)-2*x-14 = 0
3*(1/2*x+3.5)-2*x-14 = 0
10.5-1/2*x-14 = 0
-1/2*x-3.5 = 0
-1/2*x-3.5 = 0
-1/2*x-3.5 = 0 // + 3.5
-1/2*x = 3.5 // : -1/2
x = 3.5/(-1/2)
x = -7
x = -7
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