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(((1/4)*(9-(2*x))^1)/8)*(3*x+4) = 0
(((1/4)*(9-2*x))/8)*(3*x+4) = 0
(1/4*(9-2*x)*(3*x+4))/8 = 0
( 3*x+4 )
3*x+4 = 0 // - 4
3*x = -4 // : 3
x = -4/3
( 9-2*x )
9-2*x = 0 // - 9
-2*x = -9 // : -2
x = -9/(-2)
x = 9/2
x in { -4/3, 9/2 }
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