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a-199=-16a-15
We move all terms to the left:
a-199-(-16a-15)=0
We get rid of parentheses
a+16a+15-199=0
We add all the numbers together, and all the variables
17a-184=0
We move all terms containing a to the left, all other terms to the right
17a=184
a=184/17
a=10+14/17
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