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1-((7*x)/15)-(x/3)+4 = 1/5-(2*x)+4 // - 1/5-(2*x)+4
2*x-((7*x)/15)-(x/3)-(1/5)-4+1+4 = 0
(-7/15)*x-(x/3)+2*x-1/5-4+1+4 = 0
6/5*x+4/5 = 0 // - 4/5
6/5*x = -4/5 // : 6/5
x = -4/5/6/5
x = -2/3
x = -2/3
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