20-(28-9)=

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Solution for 20-(28-9)= equation: 


Simplifying
20 + -1(28 + -9) = 0

Combine like terms: 28 + -9 = 19
20 + -1(19) = 0

Multiply -1 * 19
20 + -19 = 0

Combine like terms: 20 + -19 = 1
1 = 0

Solving
1 = 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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