-1(-1)=z

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Solution for -1(-1)=z equation:


Simplifying
-1(-1) = z

Multiply -1 * -1
1 = z

Solving
1 = z

Solving for variable 'z'.

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

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

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

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

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

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

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

Simplifying
z = 1

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