31=4x-x+7

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Solution for 31=4x-x+7 equation:


Simplifying
31 = 4x + -1x + 7

Reorder the terms:
31 = 7 + 4x + -1x

Combine like terms: 4x + -1x = 3x
31 = 7 + 3x

Solving
31 = 7 + 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 + -3x = 7 + 3x + -3x

Combine like terms: 3x + -3x = 0
31 + -3x = 7 + 0
31 + -3x = 7

Add '-31' to each side of the equation.
31 + -31 + -3x = 7 + -31

Combine like terms: 31 + -31 = 0
0 + -3x = 7 + -31
-3x = 7 + -31

Combine like terms: 7 + -31 = -24
-3x = -24

Divide each side by '-3'.
x = 8

Simplifying
x = 8

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