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7*x+(2/7)*x+5 = 494/7 // - 494/7
7*x+(2/7)*x-(494/7)+5 = 0
7*x+(2/7)*x-494/7+5 = 0
51/7*x-459/7 = 0 // + 459/7
51/7*x = 459/7 // : 51/7
x = 459/7/51/7
x = 9
x = 9
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