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14a+28=9-2a
We move all terms to the left:
14a+28-(9-2a)=0
We add all the numbers together, and all the variables
14a-(-2a+9)+28=0
We get rid of parentheses
14a+2a-9+28=0
We add all the numbers together, and all the variables
16a+19=0
We move all terms containing a to the left, all other terms to the right
16a=-19
a=-19/16
a=-1+3/16
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