20-40=15-n

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Solution for 20-40=15-n equation:


Simplifying
20 + -40 = 15 + -1n

Combine like terms: 20 + -40 = -20
-20 = 15 + -1n

Solving
-20 = 15 + -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.
-20 + n = 15 + -1n + n

Combine like terms: -1n + n = 0
-20 + n = 15 + 0
-20 + n = 15

Add '20' to each side of the equation.
-20 + 20 + n = 15 + 20

Combine like terms: -20 + 20 = 0
0 + n = 15 + 20
n = 15 + 20

Combine like terms: 15 + 20 = 35
n = 35

Simplifying
n = 35

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