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x in (-oo:+oo)
(1/2)*(2*x-18) = 3*x-13 // - 3*x-13
(1/2)*(2*x-18)-(3*x)+13 = 0
(1/2)*(2*x-18)-3*x+13 = 0
1/2*(2*x-18)-3*x+13 = 0
1/2*(2*x-18)-3*x+13 = 0
13-2*x-9 = 0
4-2*x = 0
4-2*x = 0
4-2*x = 0 // - 4
-2*x = -4 // : -2
x = -4/(-2)
x = 2
x = 2
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