(18+7a)+a=42

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Solution for (18+7a)+a=42 equation: 



(18+7a)+a=42

We move all terms to the left:

(18+7a)+a-(42)=0

We add all the numbers together, and all the variables

(7a+18)+a-42=0

We add all the numbers together, and all the variables

a+(7a+18)-42=0

We get rid of parentheses

a+7a+18-42=0

We add all the numbers together, and all the variables

8a-24=0

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

8a=24

a=24/8

a=3

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