3-2n=21+7n

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Solution for 3-2n=21+7n equation:


Simplifying
3 + -2n = 21 + 7n

Solving
3 + -2n = 21 + 7n

Solving for variable 'n'.

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

Add '-7n' to each side of the equation.
3 + -2n + -7n = 21 + 7n + -7n

Combine like terms: -2n + -7n = -9n
3 + -9n = 21 + 7n + -7n

Combine like terms: 7n + -7n = 0
3 + -9n = 21 + 0
3 + -9n = 21

Add '-3' to each side of the equation.
3 + -3 + -9n = 21 + -3

Combine like terms: 3 + -3 = 0
0 + -9n = 21 + -3
-9n = 21 + -3

Combine like terms: 21 + -3 = 18
-9n = 18

Divide each side by '-9'.
n = -2

Simplifying
n = -2

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