3a-20=a+4

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Solution for 3a-20=a+4 equation: 



3a-20=a+4

We move all terms to the left:

3a-20-(a+4)=0

We get rid of parentheses

3a-a-4-20=0

We add all the numbers together, and all the variables

2a-24=0

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

2a=24

a=24/2

a=12

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