4x+31=21-x

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Solution for 4x+31=21-x equation:


Simplifying
4x + 31 = 21 + -1x

Reorder the terms:
31 + 4x = 21 + -1x

Solving
31 + 4x = 21 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
31 + 4x + x = 21 + -1x + x

Combine like terms: 4x + x = 5x
31 + 5x = 21 + -1x + x

Combine like terms: -1x + x = 0
31 + 5x = 21 + 0
31 + 5x = 21

Add '-31' to each side of the equation.
31 + -31 + 5x = 21 + -31

Combine like terms: 31 + -31 = 0
0 + 5x = 21 + -31
5x = 21 + -31

Combine like terms: 21 + -31 = -10
5x = -10

Divide each side by '5'.
x = -2

Simplifying
x = -2

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