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2a+9-2a(-4+2)=192
We move all terms to the left:
2a+9-2a(-4+2)-(192)=0
We add all the numbers together, and all the variables
2a-2a(-2)+9-192=0
We add all the numbers together, and all the variables
2a-2a(-2)-183=0
We multiply parentheses
2a+4a-183=0
We add all the numbers together, and all the variables
6a-183=0
We move all terms containing a to the left, all other terms to the right
6a=183
a=183/6
a=30+1/2
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