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(3/7)*x-(5*x)-2/3 = -26/7 // + -26/7
(3/7)*x-(5*x)-2/3-(-26/7) = 0
(3/7)*x-5*x-2/3+26/7 = 0
64/21-32/7*x = 0 // - 64/21
-32/7*x = -64/21 // : -32/7
x = -64/21/(-32/7)
x = 2/3
x = 2/3
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