9 + 10 does NOT equal 21. It is just a run-on joke about an African-American boy answering a question given by the cameraman, asking what 9 + 10 is. The boy says it is 21, and it has been a joke that has gone on for too long
1. -11 2.-3
Make sure to simplify the equation..
example: 3(2x - 7) = 6x - 21
because 3 x 2 = 6 and 3 x 7 = 21
