9x-21+9=2(5-x)

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Solution for 9x-21+9=2(5-x) equation:


Simplifying
9x + -21 + 9 = 2(5 + -1x)

Reorder the terms:
-21 + 9 + 9x = 2(5 + -1x)

Combine like terms: -21 + 9 = -12
-12 + 9x = 2(5 + -1x)
-12 + 9x = (5 * 2 + -1x * 2)
-12 + 9x = (10 + -2x)

Solving
-12 + 9x = 10 + -2x

Solving for variable 'x'.

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

Add '2x' to each side of the equation.
-12 + 9x + 2x = 10 + -2x + 2x

Combine like terms: 9x + 2x = 11x
-12 + 11x = 10 + -2x + 2x

Combine like terms: -2x + 2x = 0
-12 + 11x = 10 + 0
-12 + 11x = 10

Add '12' to each side of the equation.
-12 + 12 + 11x = 10 + 12

Combine like terms: -12 + 12 = 0
0 + 11x = 10 + 12
11x = 10 + 12

Combine like terms: 10 + 12 = 22
11x = 22

Divide each side by '11'.
x = 2

Simplifying
x = 2

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