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(3/4)*(4*x-12)+(1/6)*(30*x+18) = 0
3/4*(4*x-12)+1/6*(30*x+18) = 0
3/4*(4*x-12)+1/6*(30*x+18) = 0
8*x-6 = 0
8*x-6 = 0
8*x-6 = 0 // + 6
8*x = 6 // : 8
x = 6/8
x = 3/4
x = 3/4
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