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(3*x)/4-(13/28) = (2/7)*x // - (2/7)*x
(3*x)/4-((2/7)*x)-(13/28) = 0
(3*x)/4+(-2/7)*x-13/28 = 0
13/28*x-13/28 = 0 // + 13/28
13/28*x = 13/28 // : 13/28
x = 13/28/13/28
x = 1
x = 1
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