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5=4.2+n
We move all terms to the left:
5-(4.2+n)=0
We add all the numbers together, and all the variables
-(n+4.2)+5=0
We get rid of parentheses
-n-4.2+5=0
We add all the numbers together, and all the variables
-1n+0.8=0
We move all terms containing n to the left, all other terms to the right
-n=-0.8
n=-0.8/-1
n=0.8/1
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