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(3/4)*x+(1/2)*x = (1/2)*x // - (1/2)*x
(3/4)*x+(1/2)*x-((1/2)*x) = 0
(3/4)*x+(1/2)*x+(-1/2)*x = 0
3/4*x = 0 // : 3/4
x = 0
x = 0
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