4x+31-x=40

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Solution for 4x+31-x=40 equation:


Simplifying
4x + 31 + -1x = 40

Reorder the terms:
31 + 4x + -1x = 40

Combine like terms: 4x + -1x = 3x
31 + 3x = 40

Solving
31 + 3x = 40

Solving for variable 'x'.

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

Add '-31' to each side of the equation.
31 + -31 + 3x = 40 + -31

Combine like terms: 31 + -31 = 0
0 + 3x = 40 + -31
3x = 40 + -31

Combine like terms: 40 + -31 = 9
3x = 9

Divide each side by '3'.
x = 3

Simplifying
x = 3

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