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5*x-((2/7)*x)+6/7 = -43/14 // + -43/14
5*x-((2/7)*x)+6/7-(-43/14) = 0
5*x+(-2/7)*x+6/7+43/14 = 0
33/7*x+55/14 = 0 // - 55/14
33/7*x = -55/14 // : 33/7
x = -55/14/33/7
x = -5/6
x = -5/6
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