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4(a+3)=22
We move all terms to the left:
4(a+3)-(22)=0
We multiply parentheses
4a+12-22=0
We add all the numbers together, and all the variables
4a-10=0
We move all terms containing a to the left, all other terms to the right
4a=10
a=10/4
a=2+1/2
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