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(3*x)/2+15/2 = 5*x // - 5*x
(3*x)/2-(5*x)+15/2 = 0
(3*x)/2-5*x+15/2 = 0
15/2-7/2*x = 0 // - 15/2
-7/2*x = -15/2 // : -7/2
x = -15/2/(-7/2)
x = 15/7
x = 15/7
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