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(2/5)*x+1/3 = 7*x-787/15 // - 7*x-787/15
(2/5)*x-(7*x)+1/3-(-787/15) = 0
(2/5)*x-7*x+1/3+787/15 = 0
264/5-33/5*x = 0 // - 264/5
-33/5*x = -264/5 // : -33/5
x = -264/5/(-33/5)
x = 8
x = 8
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