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-47/28 = (-5/7)*x+(3/4)*x-2 // - (-5/7)*x+(3/4)*x-2
2-((-5/7)*x)-((3/4)*x)-47/28 = 0
(5/7)*x+(-3/4)*x-47/28+2 = 0
9/28-1/28*x = 0 // - 9/28
-1/28*x = -9/28 // : -1/28
x = -9/28/(-1/28)
x = 9
x = 9
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