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a in (-oo:+oo)
2*a+10 = 29/3 // - 29/3
2*a-(29/3)+10 = 0
2*a-29/3+10 = 0
2*a+1/3 = 0 // - 1/3
2*a = -1/3 // : 2
a = -1/3/2
a = -1/6
a = -1/6
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