x+9+7x=31

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Solution for x+9+7x=31 equation:


Simplifying
x + 9 + 7x = 31

Reorder the terms:
9 + x + 7x = 31

Combine like terms: x + 7x = 8x
9 + 8x = 31

Solving
9 + 8x = 31

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 8x = 31 + -9

Combine like terms: 9 + -9 = 0
0 + 8x = 31 + -9
8x = 31 + -9

Combine like terms: 31 + -9 = 22
8x = 22

Divide each side by '8'.
x = 2.75

Simplifying
x = 2.75

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