3x+9=42-2x

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Solution for 3x+9=42-2x equation:


Simplifying
3x + 9 = 42 + -2x

Reorder the terms:
9 + 3x = 42 + -2x

Solving
9 + 3x = 42 + -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.
9 + 3x + 2x = 42 + -2x + 2x

Combine like terms: 3x + 2x = 5x
9 + 5x = 42 + -2x + 2x

Combine like terms: -2x + 2x = 0
9 + 5x = 42 + 0
9 + 5x = 42

Add '-9' to each side of the equation.
9 + -9 + 5x = 42 + -9

Combine like terms: 9 + -9 = 0
0 + 5x = 42 + -9
5x = 42 + -9

Combine like terms: 42 + -9 = 33
5x = 33

Divide each side by '5'.
x = 6.6

Simplifying
x = 6.6

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