n-21=2n-40

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Solution for n-21=2n-40 equation:


Simplifying
n + -21 = 2n + -40

Reorder the terms:
-21 + n = 2n + -40

Reorder the terms:
-21 + n = -40 + 2n

Solving
-21 + n = -40 + 2n

Solving for variable 'n'.

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

Add '-2n' to each side of the equation.
-21 + n + -2n = -40 + 2n + -2n

Combine like terms: n + -2n = -1n
-21 + -1n = -40 + 2n + -2n

Combine like terms: 2n + -2n = 0
-21 + -1n = -40 + 0
-21 + -1n = -40

Add '21' to each side of the equation.
-21 + 21 + -1n = -40 + 21

Combine like terms: -21 + 21 = 0
0 + -1n = -40 + 21
-1n = -40 + 21

Combine like terms: -40 + 21 = -19
-1n = -19

Divide each side by '-1'.
n = 19

Simplifying
n = 19

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