21=20n+2n-1

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Solution for 21=20n+2n-1 equation:


Simplifying
21 = 20n + 2n + -1

Reorder the terms:
21 = -1 + 20n + 2n

Combine like terms: 20n + 2n = 22n
21 = -1 + 22n

Solving
21 = -1 + 22n

Solving for variable 'n'.

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

Add '-22n' to each side of the equation.
21 + -22n = -1 + 22n + -22n

Combine like terms: 22n + -22n = 0
21 + -22n = -1 + 0
21 + -22n = -1

Add '-21' to each side of the equation.
21 + -21 + -22n = -1 + -21

Combine like terms: 21 + -21 = 0
0 + -22n = -1 + -21
-22n = -1 + -21

Combine like terms: -1 + -21 = -22
-22n = -22

Divide each side by '-22'.
n = 1

Simplifying
n = 1

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