3x+21+6x+15=180

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Solution for 3x+21+6x+15=180 equation:


Simplifying
3x + 21 + 6x + 15 = 180

Reorder the terms:
21 + 15 + 3x + 6x = 180

Combine like terms: 21 + 15 = 36
36 + 3x + 6x = 180

Combine like terms: 3x + 6x = 9x
36 + 9x = 180

Solving
36 + 9x = 180

Solving for variable 'x'.

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

Add '-36' to each side of the equation.
36 + -36 + 9x = 180 + -36

Combine like terms: 36 + -36 = 0
0 + 9x = 180 + -36
9x = 180 + -36

Combine like terms: 180 + -36 = 144
9x = 144

Divide each side by '9'.
x = 16

Simplifying
x = 16

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