2a-3+(3a+1)+2a=40

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Solution for 2a-3+(3a+1)+2a=40 equation: 



2a-3+(3a+1)+2a=40

We move all terms to the left:

2a-3+(3a+1)+2a-(40)=0

We add all the numbers together, and all the variables

4a+(3a+1)-43=0

We get rid of parentheses

4a+3a+1-43=0

We add all the numbers together, and all the variables

7a-42=0

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

7a=42

a=42/7

a=6

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