12x-31=3x-4

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Solution for 12x-31=3x-4 equation:


Simplifying
12x + -31 = 3x + -4

Reorder the terms:
-31 + 12x = 3x + -4

Reorder the terms:
-31 + 12x = -4 + 3x

Solving
-31 + 12x = -4 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-31 + 12x + -3x = -4 + 3x + -3x

Combine like terms: 12x + -3x = 9x
-31 + 9x = -4 + 3x + -3x

Combine like terms: 3x + -3x = 0
-31 + 9x = -4 + 0
-31 + 9x = -4

Add '31' to each side of the equation.
-31 + 31 + 9x = -4 + 31

Combine like terms: -31 + 31 = 0
0 + 9x = -4 + 31
9x = -4 + 31

Combine like terms: -4 + 31 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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