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a in (-oo:+oo)
(1/3)*(4*a+1) = (2/3)*a+2 // - (2/3)*a+2
(1/3)*(4*a+1)-((2/3)*a)-2 = 0
(1/3)*(4*a+1)+(-2/3)*a-2 = 0
1/3*(4*a+1)+(-2*a)/3-2 = 0
(1/3*3*(4*a+1))/3+(-2*a)/3+(-2*3)/3 = 0
1/3*3*(4*a+1)-2*a-2*3 = 0
2*a-6+1 = 0
2*a-5 = 0
(2*a-5)/3 = 0
(2*a-5)/3 = 0 // * 3
2*a-5 = 0
2*a-5 = 0 // + 5
2*a = 5 // : 2
a = 5/2
a = 5/2
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