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