2(a+8)=21+7a

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Solution for 2(a+8)=21+7a equation: 



2(a+8)=21+7a

We move all terms to the left:

2(a+8)-(21+7a)=0

We add all the numbers together, and all the variables

2(a+8)-(7a+21)=0

We multiply parentheses

2a-(7a+21)+16=0

We get rid of parentheses

2a-7a-21+16=0

We add all the numbers together, and all the variables

-5a-5=0

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

-5a=5

a=5/-5

a=-1

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