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2*x-3/4 = (1/7)*x-(1/140) // - (1/7)*x-(1/140)
2*x-((1/7)*x)-3/4+1/140 = 0
2*x+(-1/7)*x-3/4+1/140 = 0
13/7*x-26/35 = 0 // + 26/35
13/7*x = 26/35 // : 13/7
x = 26/35/13/7
x = 2/5
x = 2/5
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