4a-a+2a=42

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Solution for 4a-a+2a=42 equation: 



4a-a+2a=42

We move all terms to the left:

4a-a+2a-(42)=0

We add all the numbers together, and all the variables

5a-42=0

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

5a=42

a=42/5

a=8+2/5

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