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b*((3*x)/2) = 5*a // - 5*a
b*((3*x)/2)-(5*a) = 0
b*((3*x)/2)-5*a = 0
3/2*b*x-5*a = 0 // + -5*a
3/2*b*x = -(-5*a) // : 3/2*b
x = (-(-5*a))/(3/2*b)
x = 10/3*a*b^-1
x = 10/3*a*b^-1
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