7a-1=-15 - solution

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Solution for 7a-1=-15 equation:

a in (-oo:+oo)

7*a-1 = -15 // + 15

7*a-1+15 = 0

7*a+14 = 0 // - 14

7*a = -14 // : 7

a = -14/7

a = -2

a = -2

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