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(2*x)/7-(x/3)+2+5 = 40/21 // - 40/21
(2*x)/7-(x/3)-(40/21)+2+5 = 0
(2*x)/7-(x/3)-40/21+2+5 = 0
107/21-1/21*x = 0 // - 107/21
-1/21*x = -107/21 // : -1/21
x = -107/21/(-1/21)
x = 107
x = 107
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