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x+7/14 = 11-((3/7)*x) // - 11-((3/7)*x)
x+(3/7)*x+7/14-11 = 0
10/7*x-21/2 = 0 // + 21/2
10/7*x = 21/2 // : 10/7
x = 21/2/10/7
x = 147/20
x = 147/20
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