-10-(-20)=

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Solution for -10-(-20)= equation: 


Simplifying
-10 + -1(-20) = 0

Multiply -1 * -20
-10 + 20 = 0

Combine like terms: -10 + 20 = 10
10 = 0

Solving
10 = 0

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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