31=7x+x-1

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Solution for 31=7x+x-1 equation:


Simplifying
31 = 7x + x + -1

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

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

Solving
31 = -1 + 8x

Solving for variable 'x'.

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

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

Combine like terms: 8x + -8x = 0
31 + -8x = -1 + 0
31 + -8x = -1

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

Combine like terms: 31 + -31 = 0
0 + -8x = -1 + -31
-8x = -1 + -31

Combine like terms: -1 + -31 = -32
-8x = -32

Divide each side by '-8'.
x = 4

Simplifying
x = 4

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