21+n=-(1-4n)+7

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Solution for 21+n=-(1-4n)+7 equation:


Simplifying
21 + n = -1(1 + -4n) + 7
21 + n = (1 * -1 + -4n * -1) + 7
21 + n = (-1 + 4n) + 7

Reorder the terms:
21 + n = -1 + 7 + 4n

Combine like terms: -1 + 7 = 6
21 + n = 6 + 4n

Solving
21 + n = 6 + 4n

Solving for variable 'n'.

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

Add '-4n' to each side of the equation.
21 + n + -4n = 6 + 4n + -4n

Combine like terms: n + -4n = -3n
21 + -3n = 6 + 4n + -4n

Combine like terms: 4n + -4n = 0
21 + -3n = 6 + 0
21 + -3n = 6

Add '-21' to each side of the equation.
21 + -21 + -3n = 6 + -21

Combine like terms: 21 + -21 = 0
0 + -3n = 6 + -21
-3n = 6 + -21

Combine like terms: 6 + -21 = -15
-3n = -15

Divide each side by '-3'.
n = 5

Simplifying
n = 5

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