21-2n=7(n-10)

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Solution for 21-2n=7(n-10) equation:


Simplifying
21 + -2n = 7(n + -10)

Reorder the terms:
21 + -2n = 7(-10 + n)
21 + -2n = (-10 * 7 + n * 7)
21 + -2n = (-70 + 7n)

Solving
21 + -2n = -70 + 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.
21 + -2n + -7n = -70 + 7n + -7n

Combine like terms: -2n + -7n = -9n
21 + -9n = -70 + 7n + -7n

Combine like terms: 7n + -7n = 0
21 + -9n = -70 + 0
21 + -9n = -70

Add '-21' to each side of the equation.
21 + -21 + -9n = -70 + -21

Combine like terms: 21 + -21 = 0
0 + -9n = -70 + -21
-9n = -70 + -21

Combine like terms: -70 + -21 = -91
-9n = -91

Divide each side by '-9'.
n = 10.11111111

Simplifying
n = 10.11111111

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