1a-3=12-2a

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Solution for 1a-3=12-2a equation: 



1a-3=12-2a

We move all terms to the left:

1a-3-(12-2a)=0

We add all the numbers together, and all the variables

1a-(-2a+12)-3=0

We add all the numbers together, and all the variables

a-(-2a+12)-3=0

We get rid of parentheses

a+2a-12-3=0

We add all the numbers together, and all the variables

3a-15=0

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

3a=15

a=15/3

a=5

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