3(a-5)=21+2a

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Solution for 3(a-5)=21+2a equation: 



3(a-5)=21+2a

We move all terms to the left:

3(a-5)-(21+2a)=0

We add all the numbers together, and all the variables

3(a-5)-(2a+21)=0

We multiply parentheses

3a-(2a+21)-15=0

We get rid of parentheses

3a-2a-21-15=0

We add all the numbers together, and all the variables

a-36=0

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

a=36

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