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(1/4)*x-(2/9) = (-1/2)*x+91/198 // - (-1/2)*x+91/198
(1/4)*x-((-1/2)*x)-(2/9)-(91/198) = 0
(1/4)*x+(1/2)*x-2/9-91/198 = 0
3/4*x-15/22 = 0 // + 15/22
3/4*x = 15/22 // : 3/4
x = 15/22/3/4
x = 10/11
x = 10/11
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