2x+9=12+9

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Solution for 2x+9=12+9 equation: 


Simplifying
2x + 9 = 12 + 9

Reorder the terms:
9 + 2x = 12 + 9

Combine like terms: 12 + 9 = 21
9 + 2x = 21

Solving
9 + 2x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 2x = 21 + -9

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

Combine like terms: 21 + -9 = 12
2x = 12

Divide each side by '2'.
x = 6

Simplifying
x = 6

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