72=100-n

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Solution for 72=100-n equation:


Simplifying
72 = 100 + -1n

Solving
72 = 100 + -1n

Solving for variable 'n'.

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

Add 'n' to each side of the equation.
72 + n = 100 + -1n + n

Combine like terms: -1n + n = 0
72 + n = 100 + 0
72 + n = 100

Add '-72' to each side of the equation.
72 + -72 + n = 100 + -72

Combine like terms: 72 + -72 = 0
0 + n = 100 + -72
n = 100 + -72

Combine like terms: 100 + -72 = 28
n = 28

Simplifying
n = 28

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