2a+19=7-a

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Solution for 2a+19=7-a equation: 



2a+19=7-a

We move all terms to the left:

2a+19-(7-a)=0

We add all the numbers together, and all the variables

2a-(-1a+7)+19=0

We get rid of parentheses

2a+1a-7+19=0

We add all the numbers together, and all the variables

3a+12=0

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

3a=-12

a=-12/3

a=-4

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