20-.5n=12.5

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Solution for 20-.5n=12.5 equation: 


Simplifying
20 + -0.5n = 12.5

Solving
20 + -0.5n = 12.5

Solving for variable 'n'.

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

Add '-20' to each side of the equation.
20 + -20 + -0.5n = 12.5 + -20

Combine like terms: 20 + -20 = 0
0 + -0.5n = 12.5 + -20
-0.5n = 12.5 + -20

Combine like terms: 12.5 + -20 = -7.5
-0.5n = -7.5

Divide each side by '-0.5'.
n = 15

Simplifying
n = 15

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