(-9)-(-3)=x

Solution for (-9)-(-3)=x equation:

Simplifying
(-9) + -1(-3) = x
-9 + -1(-3) = x

Multiply -1 * -3
-9 + 3 = x

Combine like terms: -9 + 3 = -6
-6 = x

Solving
-6 = 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.
-6 + -1x = x + -1x

Combine like terms: x + -1x = 0
-6 + -1x = 0

Add '6' to each side of the equation.
-6 + 6 + -1x = 0 + 6

Combine like terms: -6 + 6 = 0
0 + -1x = 0 + 6
-1x = 0 + 6

Combine like terms: 0 + 6 = 6
-1x = 6

Divide each side by '-1'.
x = -6

Simplifying
x = -6