9x-21-5x=31

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Solution for 9x-21-5x=31 equation:


Simplifying
9x + -21 + -5x = 31

Reorder the terms:
-21 + 9x + -5x = 31

Combine like terms: 9x + -5x = 4x
-21 + 4x = 31

Solving
-21 + 4x = 31

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 + 4x = 31 + 21

Combine like terms: -21 + 21 = 0
0 + 4x = 31 + 21
4x = 31 + 21

Combine like terms: 31 + 21 = 52
4x = 52

Divide each side by '4'.
x = 13

Simplifying
x = 13

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