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6*x+2/5 = (-2/3)*x+706/15 // - (-2/3)*x+706/15
6*x-((-2/3)*x)+2/5-(706/15) = 0
6*x+(2/3)*x+2/5-706/15 = 0
20/3*x-140/3 = 0 // + 140/3
20/3*x = 140/3 // : 20/3
x = 140/3/20/3
x = 7
x = 7
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