-(-20)-(-5)-z=20

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Solution for -(-20)-(-5)-z=20 equation:


Simplifying
-1(-20) + -1(-5) + -1z = 20

Multiply -1 * -20
20 + -1(-5) + -1z = 20

Multiply -1 * -5
20 + 5 + -1z = 20

Combine like terms: 20 + 5 = 25
25 + -1z = 20

Solving
25 + -1z = 20

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-25' to each side of the equation.
25 + -25 + -1z = 20 + -25

Combine like terms: 25 + -25 = 0
0 + -1z = 20 + -25
-1z = 20 + -25

Combine like terms: 20 + -25 = -5
-1z = -5

Divide each side by '-1'.
z = 5

Simplifying
z = 5

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