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(3/4)*x-(1/2)-(1/7) = 0
(3/4)*x-1/2-1/7 = 0
3/4*x-9/14 = 0 // + 9/14
3/4*x = 9/14 // : 3/4
x = 9/14/3/4
x = 6/7
x = 6/7
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