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20a-22=4a-54
We move all terms to the left:
20a-22-(4a-54)=0
We get rid of parentheses
20a-4a+54-22=0
We add all the numbers together, and all the variables
16a+32=0
We move all terms containing a to the left, all other terms to the right
16a=-32
a=-32/16
a=-2
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