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4(2+a)=2
We move all terms to the left:
4(2+a)-(2)=0
We add all the numbers together, and all the variables
4(a+2)-2=0
We multiply parentheses
4a+8-2=0
We add all the numbers together, and all the variables
4a+6=0
We move all terms containing a to the left, all other terms to the right
4a=-6
a=-6/4
a=-1+1/2
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