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((2*x)/3)*(12*x+18) = 0
2/3*x*(12*x+18) = 0
( 12*x+18 )
12*x+18 = 0 // - 18
12*x = -18 // : 12
x = -18/12
x = -3/2
( 2/3*x )
2/3*x = 0 // : 2/3
x = 0
x in { -3/2, 0 }
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