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0.8(4-a)=5
We move all terms to the left:
0.8(4-a)-(5)=0
We add all the numbers together, and all the variables
0.8(-1a+4)-5=0
We multiply parentheses
-0.8a+3.2-5=0
We add all the numbers together, and all the variables
-0.8a-1.8=0
We move all terms containing a to the left, all other terms to the right
-0.8a=1.8
a=1.8/-0.8
a=-2+0.2/0.8
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