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4a+7=-2+19
We move all terms to the left:
4a+7-(-2+19)=0
We add all the numbers together, and all the variables
4a+7-17=0
We add all the numbers together, and all the variables
4a-10=0
We move all terms containing a to the left, all other terms to the right
4a=10
a=10/4
a=2+1/2
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