3-(-9)=x+5

Solution for 3-(-9)=x+5 equation:

Simplifying
3 + -1(-9) = x + 5

Multiply -1 * -9
3 + 9 = x + 5

Combine like terms: 3 + 9 = 12
12 = x + 5

Reorder the terms:
12 = 5 + x

Solving
12 = 5 + 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.
12 + -1x = 5 + x + -1x

Combine like terms: x + -1x = 0
12 + -1x = 5 + 0
12 + -1x = 5

Add '-12' to each side of the equation.
12 + -12 + -1x = 5 + -12

Combine like terms: 12 + -12 = 0
0 + -1x = 5 + -12
-1x = 5 + -12

Combine like terms: 5 + -12 = -7
-1x = -7

Divide each side by '-1'.
x = 7

Simplifying
x = 7