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2*x-(7/10) = (1/4)*x+7/15 // - (1/4)*x+7/15
2*x-((1/4)*x)-(7/10)-(7/15) = 0
2*x+(-1/4)*x-7/10-7/15 = 0
7/4*x-7/6 = 0 // + 7/6
7/4*x = 7/6 // : 7/4
x = 7/6/7/4
x = 2/3
x = 2/3
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