42-4x=5x+21

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Solution for 42-4x=5x+21 equation:


Simplifying
42 + -4x = 5x + 21

Reorder the terms:
42 + -4x = 21 + 5x

Solving
42 + -4x = 21 + 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.
42 + -4x + -5x = 21 + 5x + -5x

Combine like terms: -4x + -5x = -9x
42 + -9x = 21 + 5x + -5x

Combine like terms: 5x + -5x = 0
42 + -9x = 21 + 0
42 + -9x = 21

Add '-42' to each side of the equation.
42 + -42 + -9x = 21 + -42

Combine like terms: 42 + -42 = 0
0 + -9x = 21 + -42
-9x = 21 + -42

Combine like terms: 21 + -42 = -21
-9x = -21

Divide each side by '-9'.
x = 2.333333333

Simplifying
x = 2.333333333

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