(21-30)(-12+1)=

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Solution for (21-30)(-12+1)= equation: 


Simplifying
(21 + -30)(-12 + 1) = 0

Combine like terms: 21 + -30 = -9
(-9)(-12 + 1) = 0

Combine like terms: -12 + 1 = -11
-9(-11) = 0

Multiply -9 * -11
99 = 0

Solving
99 = 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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