-(-7)+16-20-(-9)=X

Solution for -(-7)+16-20-(-9)=X equation:

Simplifying
-1(-7) + 16 + -20 + -1(-9) = X

Multiply -1 * -7
7 + 16 + -20 + -1(-9) = X

Multiply -1 * -9
7 + 16 + -20 + 9 = X

Combine like terms: 7 + 16 = 23
23 + -20 + 9 = X

Combine like terms: 23 + -20 = 3
3 + 9 = X

Combine like terms: 3 + 9 = 12
12 = X

Solving
12 = 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 = X + -1X

Combine like terms: X + -1X = 0
12 + -1X = 0

Add '-12' to each side of the equation.
12 + -12 + -1X = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -1X = 0 + -12
-1X = 0 + -12

Combine like terms: 0 + -12 = -12
-1X = -12

Divide each side by '-1'.
X = 12

Simplifying
X = 12