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3*x+7*x+5/5+8/10 = -8 // + 8
3*x+7*x+5/5+8/10+8 = 0
10*x+49/5 = 0 // - 49/5
10*x = -49/5 // : 10
x = -49/5/10
x = -49/50
x = -49/50
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