-3+a=-a-7

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Solution for -3+a=-a-7 equation: 


a in (-oo:+oo)

a-3 = -a-7 // + -a-7

a+a-3+7 = 0

2*a+4 = 0 // - 4

2*a = -4 // : 2

a = -4/2

a = -2

a = -2

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