7a+9=86

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Solution for 7a+9=86 equation: 


a in (-oo:+oo)

7*a+9 = 86 // - 86

7*a-86+9 = 0

7*a-77 = 0 // + 77

7*a = 77 // : 7

a = 77/7

a = 11

a = 11

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