7.5=3.3-2.1n

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Solution for 7.5=3.3-2.1n equation: 



7.5=3.3-2.1n

We move all terms to the left:

7.5-(3.3-2.1n)=0

We add all the numbers together, and all the variables

-(-2.1n+3.3)+7.5=0

We get rid of parentheses

2.1n-3.3+7.5=0

We add all the numbers together, and all the variables

2.1n+4.2=0

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

2.1n=-4.2

n=-4.2/2.1

n=-2

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