-4+2a+a=-25

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Solution for -4+2a+a=-25 equation: 


a in (-oo:+oo)

2*a+a-4 = -25 // + 25

2*a+a-4+25 = 0

3*a+21 = 0 // - 21

3*a = -21 // : 3

a = -21/3

a = -7

a = -7

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