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(2.4+4n)+9=0
We add all the numbers together, and all the variables
(4n+2.4)+9=0
We get rid of parentheses
4n+2.4+9=0
We add all the numbers together, and all the variables
4n+11.4=0
We move all terms containing n to the left, all other terms to the right
4n=-11.4
n=-11.4/4
n=-2+2.4285714285714/2.8571428571429
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