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3*x+18/28 = 342-987 // - 342-987
3*x+18/28-342+987 = 0
3*x+9039/14 = 0 // - 9039/14
3*x = -9039/14 // : 3
x = -9039/14/3
x = -3013/14
x = -3013/14
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