7-9=x

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Solution for 7-9=x equation:


Simplifying
7 + -9 = x

Combine like terms: 7 + -9 = -2
-2 = x

Solving
-2 = 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.
-2 + -1x = x + -1x

Combine like terms: x + -1x = 0
-2 + -1x = 0

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2

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