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34/7 = (5/7)*x+7*x+1 // - (5/7)*x+7*x+1
34/7-((5/7)*x)-(7*x)-1 = 0
(-5/7)*x-7*x+34/7-1 = 0
27/7-54/7*x = 0 // - 27/7
-54/7*x = -27/7 // : -54/7
x = -27/7/(-54/7)
x = 1/2
x = 1/2
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