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(2*x)/5-(x/7)+3+4 = 16/35 // - 16/35
(2*x)/5-(x/7)-(16/35)+3+4 = 0
(2*x)/5-(x/7)-16/35+3+4 = 0
9/35*x+229/35 = 0 // - 229/35
9/35*x = -229/35 // : 9/35
x = -229/35/9/35
x = -229/9
x = -229/9
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