(30-9)(20-1)=

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Solution for (30-9)(20-1)= equation: 


Simplifying
(30 + -9)(20 + -1) = 0

Combine like terms: 30 + -9 = 21
(21)(20 + -1) = 0

Combine like terms: 20 + -1 = 19
21(19) = 0

Multiply 21 * 19
399 = 0

Solving
399 = 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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