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(7/4)*x-2 = (5/6)*x-4 // - (5/6)*x-4
(7/4)*x-((5/6)*x)-2+4 = 0
(7/4)*x+(-5/6)*x-2+4 = 0
11/12*x+2 = 0 // - 2
11/12*x = -2 // : 11/12
x = -2/11/12
x = -24/11
x = -24/11
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