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18 = (3/4)*(2*x-1) // - (3/4)*(2*x-1)
18-((3/4)*(2*x-1)) = 0
(-3/4)*(2*x-1)+18 = 0
18-3/4*(2*x-1) = 0
18-3/4*(2*x-1) = 0
75/4-3/2*x = 0
75/4-3/2*x = 0
75/4-3/2*x = 0 // - 75/4
-3/2*x = -75/4 // : -3/2
x = -75/4/(-3/2)
x = 25/2
x = 25/2
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