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0.4(a+2)=2
We move all terms to the left:
0.4(a+2)-(2)=0
We multiply parentheses
0.4a+0.8-2=0
We add all the numbers together, and all the variables
0.4a-1.2=0
We move all terms containing a to the left, all other terms to the right
0.4a=1.2
a=1.2/0.4
a=2+0.4/0.4
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