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z in (-oo:+oo)
2*((3*z)/2-1/5) = z-37/5 // - z-37/5
2*((3*z)/2-1/5)-z-(-37/5) = 0
2*((3*z)/2-1/5)-z+37/5 = 0
2*(3/2*z-1/5)-z+37/5 = 0
(2*5*(3/2*z-1/5))/5+(5*(-z))/5+37/5 = 0
2*5*(3/2*z-1/5)+5*(-z)+37 = 0
10*z-2+37 = 0
10*z+35 = 0
(10*z+35)/5 = 0
(10*z+35)/5 = 0 // * 5
10*z+35 = 0
10*z+35 = 0 // - 35
10*z = -35 // : 10
z = -35/10
z = -7/2
z = -7/2
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