4a=120+a

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Solution for 4a=120+a equation: 



4a=120+a

We move all terms to the left:

4a-(120+a)=0

We add all the numbers together, and all the variables

4a-(a+120)=0

We get rid of parentheses

4a-a-120=0

We add all the numbers together, and all the variables

3a-120=0

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

3a=120

a=120/3

a=40

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