2(4a+9)=2a+21

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Solution for 2(4a+9)=2a+21 equation: 



2(4a+9)=2a+21

We move all terms to the left:

2(4a+9)-(2a+21)=0

We multiply parentheses

8a-(2a+21)+18=0

We get rid of parentheses

8a-2a-21+18=0

We add all the numbers together, and all the variables

6a-3=0

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

6a=3

a=3/6

a=1/2

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