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8=11-13a
We move all terms to the left:
8-(11-13a)=0
We add all the numbers together, and all the variables
-(-13a+11)+8=0
We get rid of parentheses
13a-11+8=0
We add all the numbers together, and all the variables
13a-3=0
We move all terms containing a to the left, all other terms to the right
13a=3
a=3/13
a=3/13
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