6a=3a+90

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Solution for 6a=3a+90 equation: 



6a=3a+90

We move all terms to the left:

6a-(3a+90)=0

We get rid of parentheses

6a-3a-90=0

We add all the numbers together, and all the variables

3a-90=0

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

3a=90

a=90/3

a=30

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