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(3/4)*x+2/3 = -1/4 // + -1/4
(3/4)*x+2/3-(-1/4) = 0
(3/4)*x+2/3+1/4 = 0
3/4*x+11/12 = 0 // - 11/12
3/4*x = -11/12 // : 3/4
x = -11/12/3/4
x = -11/9
x = -11/9
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