85=21+4n

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Solution for 85=21+4n equation:


Simplifying
85 = 21 + 4n

Solving
85 = 21 + 4n

Solving for variable 'n'.

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

Add '-4n' to each side of the equation.
85 + -4n = 21 + 4n + -4n

Combine like terms: 4n + -4n = 0
85 + -4n = 21 + 0
85 + -4n = 21

Add '-85' to each side of the equation.
85 + -85 + -4n = 21 + -85

Combine like terms: 85 + -85 = 0
0 + -4n = 21 + -85
-4n = 21 + -85

Combine like terms: 21 + -85 = -64
-4n = -64

Divide each side by '-4'.
n = 16

Simplifying
n = 16

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