3a+a=42

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Solution for 3a+a=42 equation: 



3a+a=42

We move all terms to the left:

3a+a-(42)=0

We add all the numbers together, and all the variables

4a-42=0

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

4a=42

a=42/4

a=10+1/2

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