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(2/3)*x-(1/4) = -((5/6)*x)-7/4 // + -((5/6)*x)-7/4
(2/3)*x+(5/6)*x-(1/4)-(-7/4) = 0
(2/3)*x+(5/6)*x-1/4+7/4 = 0
3/2*x+3/2 = 0 // - 3/2
3/2*x = -3/2 // : 3/2
x = -3/2/3/2
x = -1
x = -1
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