3x+18=5x-42

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Solution for 3x+18=5x-42 equation:


Simplifying
3x + 18 = 5x + -42

Reorder the terms:
18 + 3x = 5x + -42

Reorder the terms:
18 + 3x = -42 + 5x

Solving
18 + 3x = -42 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
18 + 3x + -5x = -42 + 5x + -5x

Combine like terms: 3x + -5x = -2x
18 + -2x = -42 + 5x + -5x

Combine like terms: 5x + -5x = 0
18 + -2x = -42 + 0
18 + -2x = -42

Add '-18' to each side of the equation.
18 + -18 + -2x = -42 + -18

Combine like terms: 18 + -18 = 0
0 + -2x = -42 + -18
-2x = -42 + -18

Combine like terms: -42 + -18 = -60
-2x = -60

Divide each side by '-2'.
x = 30

Simplifying
x = 30

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