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(1/2)*(x+6) = (2/9)*(x+8) // - (2/9)*(x+8)
(1/2)*(x+6)-((2/9)*(x+8)) = 0
(1/2)*(x+6)+(-2/9)*(x+8) = 0
1/2*(x+6)-2/9*(x+8) = 0
1/2*(x+6)-2/9*(x+8) = 0
5/18*x+11/9 = 0
5/18*x+11/9 = 0
5/18*x+11/9 = 0 // - 11/9
5/18*x = -11/9 // : 5/18
x = -11/9/5/18
x = -22/5
x = -22/5
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