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10a-10=14a+20
We move all terms to the left:
10a-10-(14a+20)=0
We get rid of parentheses
10a-14a-20-10=0
We add all the numbers together, and all the variables
-4a-30=0
We move all terms containing a to the left, all other terms to the right
-4a=30
a=30/-4
a=-7+1/2
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