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a=45a+7a-8
We move all terms to the left:
a-(45a+7a-8)=0
We add all the numbers together, and all the variables
a-(52a-8)=0
We get rid of parentheses
a-52a+8=0
We add all the numbers together, and all the variables
-51a+8=0
We move all terms containing a to the left, all other terms to the right
-51a=-8
a=-8/-51
a=8/51
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