12a+14=7a-21

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Solution for 12a+14=7a-21 equation: 



12a+14=7a-21

We move all terms to the left:

12a+14-(7a-21)=0

We get rid of parentheses

12a-7a+21+14=0

We add all the numbers together, and all the variables

5a+35=0

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

5a=-35

a=-35/5

a=-7

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