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25=1.6-a
We move all terms to the left:
25-(1.6-a)=0
We add all the numbers together, and all the variables
-(-1a+1.6)+25=0
We get rid of parentheses
1a-1.6+25=0
We add all the numbers together, and all the variables
a+23.4=0
We move all terms containing a to the left, all other terms to the right
a=-23.4
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