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(3/4)*x-3 = 7*x-237/4 // - 7*x-237/4
(3/4)*x-(7*x)-(-237/4)-3 = 0
(3/4)*x-7*x+237/4-3 = 0
225/4-25/4*x = 0 // - 225/4
-25/4*x = -225/4 // : -25/4
x = -225/4/(-25/4)
x = 9
x = 9
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