3a-15=4a+18

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Solution for 3a-15=4a+18 equation: 



3a-15=4a+18

We move all terms to the left:

3a-15-(4a+18)=0

We get rid of parentheses

3a-4a-18-15=0

We add all the numbers together, and all the variables

-1a-33=0

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

-a=33

a=33/-1

a=-33

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