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3/5-((1/2)*x) = 3*x-(3/2) // - 3*x-(3/2)
3/5-((1/2)*x)-(3*x)+3/2 = 0
(-1/2)*x-3*x+3/5+3/2 = 0
21/10-7/2*x = 0 // - 21/10
-7/2*x = -21/10 // : -7/2
x = -21/10/(-7/2)
x = 3/5
x = 3/5
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