3a=a+30

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Solution for 3a=a+30 equation: 



3a=a+30

We move all terms to the left:

3a-(a+30)=0

We get rid of parentheses

3a-a-30=0

We add all the numbers together, and all the variables

2a-30=0

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

2a=30

a=30/2

a=15

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