8(a+1)=-21

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Solution for 8(a+1)=-21 equation: 



8(a+1)=-21

We move all terms to the left:

8(a+1)-(-21)=0

We add all the numbers together, and all the variables

8(a+1)+21=0

We multiply parentheses

8a+8+21=0

We add all the numbers together, and all the variables

8a+29=0

We move all terms containing a to the left, all other terms to the right

8a=-29

a=-29/8

a=-3+5/8

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