(a+7)-6=20

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Solution for (a+7)-6=20 equation: 



(a+7)-6=20

We move all terms to the left:

(a+7)-6-(20)=0

We add all the numbers together, and all the variables

(a+7)-26=0

We get rid of parentheses

a+7-26=0

We add all the numbers together, and all the variables

a-19=0

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

a=19

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