9x+21+2x=3(3x+9)

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Solution for 9x+21+2x=3(3x+9) equation:


Simplifying
9x + 21 + 2x = 3(3x + 9)

Reorder the terms:
21 + 9x + 2x = 3(3x + 9)

Combine like terms: 9x + 2x = 11x
21 + 11x = 3(3x + 9)

Reorder the terms:
21 + 11x = 3(9 + 3x)
21 + 11x = (9 * 3 + 3x * 3)
21 + 11x = (27 + 9x)

Solving
21 + 11x = 27 + 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.
21 + 11x + -9x = 27 + 9x + -9x

Combine like terms: 11x + -9x = 2x
21 + 2x = 27 + 9x + -9x

Combine like terms: 9x + -9x = 0
21 + 2x = 27 + 0
21 + 2x = 27

Add '-21' to each side of the equation.
21 + -21 + 2x = 27 + -21

Combine like terms: 21 + -21 = 0
0 + 2x = 27 + -21
2x = 27 + -21

Combine like terms: 27 + -21 = 6
2x = 6

Divide each side by '2'.
x = 3

Simplifying
x = 3

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