3x-9-7x=31

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Solution for 3x-9-7x=31 equation:


Simplifying
3x + -9 + -7x = 31

Reorder the terms:
-9 + 3x + -7x = 31

Combine like terms: 3x + -7x = -4x
-9 + -4x = 31

Solving
-9 + -4x = 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 + -4x = 31 + 9

Combine like terms: -9 + 9 = 0
0 + -4x = 31 + 9
-4x = 31 + 9

Combine like terms: 31 + 9 = 40
-4x = 40

Divide each side by '-4'.
x = -10

Simplifying
x = -10

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