3n-4n=-7

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Solution for 3n-4n=-7 equation: 


Simplifying
3n + -4n = -7

Combine like terms: 3n + -4n = -1n
-1n = -7

Solving
-1n = -7

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Divide each side by '-1'.
n = 7

Simplifying
n = 7

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