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2.9n+0.04=3.1n+0.1
We move all terms to the left:
2.9n+0.04-(3.1n+0.1)=0
We get rid of parentheses
2.9n-3.1n-0.1+0.04=0
We add all the numbers together, and all the variables
-0.2n-0.06=0
We move all terms containing n to the left, all other terms to the right
-0.2n=0.06
n=0.06/-0.2
n=-0.06/0.2
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