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(7/16)*x-(1/8) = (1/4)*x // - (1/4)*x
(7/16)*x-((1/4)*x)-(1/8) = 0
(7/16)*x+(-1/4)*x-1/8 = 0
3/16*x-1/8 = 0 // + 1/8
3/16*x = 1/8 // : 3/16
x = 1/8/3/16
x = 2/3
x = 2/3
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