-21+2n=1-(1-9n)

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Solution for -21+2n=1-(1-9n) equation:


Simplifying
-21 + 2n = 1 + -1(1 + -9n)
-21 + 2n = 1 + (1 * -1 + -9n * -1)
-21 + 2n = 1 + (-1 + 9n)

Combine like terms: 1 + -1 = 0
-21 + 2n = 0 + 9n
-21 + 2n = 9n

Solving
-21 + 2n = 9n

Solving for variable 'n'.

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

Add '-9n' to each side of the equation.
-21 + 2n + -9n = 9n + -9n

Combine like terms: 2n + -9n = -7n
-21 + -7n = 9n + -9n

Combine like terms: 9n + -9n = 0
-21 + -7n = 0

Add '21' to each side of the equation.
-21 + 21 + -7n = 0 + 21

Combine like terms: -21 + 21 = 0
0 + -7n = 0 + 21
-7n = 0 + 21

Combine like terms: 0 + 21 = 21
-7n = 21

Divide each side by '-7'.
n = -3

Simplifying
n = -3

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