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a+5+(a+12)+(a-10)=194
We move all terms to the left:
a+5+(a+12)+(a-10)-(194)=0
We add all the numbers together, and all the variables
a+(a+12)+(a-10)-189=0
We get rid of parentheses
a+a+a+12-10-189=0
We add all the numbers together, and all the variables
3a-187=0
We move all terms containing a to the left, all other terms to the right
3a=187
a=187/3
a=62+1/3
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