3a+7=2a-9

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Solution for 3a+7=2a-9 equation: 



3a+7=2a-9

We move all terms to the left:

3a+7-(2a-9)=0

We get rid of parentheses

3a-2a+9+7=0

We add all the numbers together, and all the variables

a+16=0

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

a=-16

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