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(3/2)*x+9 = 4*x-8 // - 4*x-8
(3/2)*x-(4*x)+8+9 = 0
(3/2)*x-4*x+8+9 = 0
17-5/2*x = 0 // - 17
-5/2*x = -17 // : -5/2
x = -17/(-5/2)
x = 34/5
x = 34/5
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