3+8x=31+x

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Solution for 3+8x=31+x equation:


Simplifying
3 + 8x = 31 + x

Solving
3 + 8x = 31 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
3 + 8x + -1x = 31 + x + -1x

Combine like terms: 8x + -1x = 7x
3 + 7x = 31 + x + -1x

Combine like terms: x + -1x = 0
3 + 7x = 31 + 0
3 + 7x = 31

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

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

Combine like terms: 31 + -3 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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