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2*x-14 = 1/2-9.5+15 // - 1/2-9.5+15
2*x-(1/2)-15-14+9.5 = 0
2*x-1/2-15-14+9.5 = 0
2*x-20 = 0 // + 20
2*x = 20 // : 2
x = 20/2
x = 10
x = 10
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