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a in (-oo:+oo)
2*(2*a+0.5) = 3*(a-(2/3)) // - 3*(a-(2/3))
2*(2*a+0.5)-(3*(a-(2/3))) = 0
2*(2*a+0.5)-3*(a-2/3) = 0
2*(2*a+0.5)-3*(a-2/3) = 0
a+3 = 0
a+3 = 0
a+3 = 0 // - 3
a = -3
a = -3
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