6x+12-3x+9=45

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Solution for 6x+12-3x+9=45 equation:


Simplifying
6x + 12 + -3x + 9 = 45

Reorder the terms:
12 + 9 + 6x + -3x = 45

Combine like terms: 12 + 9 = 21
21 + 6x + -3x = 45

Combine like terms: 6x + -3x = 3x
21 + 3x = 45

Solving
21 + 3x = 45

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 3x = 45 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = 45 + -21
3x = 45 + -21

Combine like terms: 45 + -21 = 24
3x = 24

Divide each side by '3'.
x = 8

Simplifying
x = 8

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