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2*x+7*x-((15/2)*x)-3 = 10 // - 10
2*x+7*x-((15/2)*x)-10-3 = 0
2*x+7*x+(-15/2)*x-10-3 = 0
3/2*x-13 = 0 // + 13
3/2*x = 13 // : 3/2
x = 13/3/2
x = 26/3
x = 26/3
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