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(-4/7)*x+(5/6)*x+1/2 = 37/63 // - 37/63
(-4/7)*x+(5/6)*x+1/2-(37/63) = 0
(-4/7)*x+(5/6)*x+1/2-37/63 = 0
11/42*x-11/126 = 0 // + 11/126
11/42*x = 11/126 // : 11/42
x = 11/126/11/42
x = 1/3
x = 1/3
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