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5*x-((3*x)/2)-(2/4) = 0
5*x+(-3/2)*x-1/2 = 0
7/2*x-1/2 = 0 // + 1/2
7/2*x = 1/2 // : 7/2
x = 1/2/7/2
x = 1/7
x = 1/7
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