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t in (-oo:+oo)
(2*(t+9))/3 = t-8 // - t-8
(2*(t+9))/3-t+8 = 0
(2*(t+9))/3+(3*(-t))/3+(3*8)/3 = 0
2*(t+9)+3*(-t)+3*8 = 0
18-t+24 = 0
42-t = 0
(42-t)/3 = 0
(42-t)/3 = 0 // * 3
42-t = 0
42-t = 0 // - 42
-t = -42 // * -1
t = 42
t = 42
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