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5/7-3*x = -226/7 // + -226/7
5/7-3*x-(-226/7) = 0
5/7-3*x+226/7 = 0
33-3*x = 0 // - 33
-3*x = -33 // : -3
x = -33/(-3)
x = 11
x = 11
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