(15a+7)-12=20

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Solution for (15a+7)-12=20 equation: 



(15a+7)-12=20

We move all terms to the left:

(15a+7)-12-(20)=0

We add all the numbers together, and all the variables

(15a+7)-32=0

We get rid of parentheses

15a+7-32=0

We add all the numbers together, and all the variables

15a-25=0

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

15a=25

a=25/15

a=1+2/3

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