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(3/5)*(5*x-20)+(1/4)*(20*x+4) = 0
3/5*(5*x-20)+1/4*(20*x+4) = 0
3/5*(5*x-20)+1/4*(20*x+4) = 0
8*x-11 = 0
8*x-11 = 0
8*x-11 = 0 // + 11
8*x = 11 // : 8
x = 11/8
x = 11/8
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