3x+42=9x+18

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Solution for 3x+42=9x+18 equation:


Simplifying
3x + 42 = 9x + 18

Reorder the terms:
42 + 3x = 9x + 18

Reorder the terms:
42 + 3x = 18 + 9x

Solving
42 + 3x = 18 + 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.
42 + 3x + -9x = 18 + 9x + -9x

Combine like terms: 3x + -9x = -6x
42 + -6x = 18 + 9x + -9x

Combine like terms: 9x + -9x = 0
42 + -6x = 18 + 0
42 + -6x = 18

Add '-42' to each side of the equation.
42 + -42 + -6x = 18 + -42

Combine like terms: 42 + -42 = 0
0 + -6x = 18 + -42
-6x = 18 + -42

Combine like terms: 18 + -42 = -24
-6x = -24

Divide each side by '-6'.
x = 4

Simplifying
x = 4

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