7a+7=28

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Solution for 7a+7=28 equation: 


a in (-oo:+oo)

7*a+7 = 28 // - 28

7*a-28+7 = 0

7*a-21 = 0 // + 21

7*a = 21 // : 7

a = 21/7

a = 3

a = 3

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