a/3+7=12 - solution

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Solution for a/3+7=12 equation:

a in (-oo:+oo)

a/3+7 = 12 // - 12

a/3-12+7 = 0

1/3*a-5 = 0 // + 5

1/3*a = 5 // : 1/3

a = 5/1/3

a = 15

a = 15

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