21-(x+7)=9x-6

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Solution for 21-(x+7)=9x-6 equation:


Simplifying
21 + -1(x + 7) = 9x + -6

Reorder the terms:
21 + -1(7 + x) = 9x + -6
21 + (7 * -1 + x * -1) = 9x + -6
21 + (-7 + -1x) = 9x + -6

Combine like terms: 21 + -7 = 14
14 + -1x = 9x + -6

Reorder the terms:
14 + -1x = -6 + 9x

Solving
14 + -1x = -6 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
14 + -1x + -9x = -6 + 9x + -9x

Combine like terms: -1x + -9x = -10x
14 + -10x = -6 + 9x + -9x

Combine like terms: 9x + -9x = 0
14 + -10x = -6 + 0
14 + -10x = -6

Add '-14' to each side of the equation.
14 + -14 + -10x = -6 + -14

Combine like terms: 14 + -14 = 0
0 + -10x = -6 + -14
-10x = -6 + -14

Combine like terms: -6 + -14 = -20
-10x = -20

Divide each side by '-10'.
x = 2

Simplifying
x = 2

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