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2*x+x+(1/2)*x-118-26+16 = 180 // - 180
2*x+x+(1/2)*x-180-118-26+16 = 0
7/2*x-308 = 0 // + 308
7/2*x = 308 // : 7/2
x = 308/7/2
x = 88
x = 88
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