15+a/6=-21

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Solution for 15+a/6=-21 equation: 


a in (-oo:+oo)

a/6+15 = -21 // + 21

a/6+15+21 = 0

1/6*a+36 = 0 // - 36

1/6*a = -36 // : 1/6

a = -36/1/6

a = -216

a = -216

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