20-(10+5)=

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Solution for 20-(10+5)= equation: 


Simplifying
20 + -1(10 + 5) = 0

Combine like terms: 10 + 5 = 15
20 + -1(15) = 0

Multiply -1 * 15
20 + -15 = 0

Combine like terms: 20 + -15 = 5
5 = 0

Solving
5 = 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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