2n+9=4

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Solution for 2n+9=4 equation: 



2n+9=4

We move all terms to the left:

2n+9-(4)=0

We add all the numbers together, and all the variables

2n+5=0

We move all terms containing n to the left, all other terms to the right

2n=-5

n=-5/2

n=-2+1/2

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