Answer:
5
Step-by-step explanation:
5*2 = 10-33 = -23+18=5
Answer:
(x - y)(x - y + a)
Step-by-step explanation:

-7x + 2x (add common factors)
-5x+6+21 (what happen to one side happens to the others
-5x=21 (divide by five)
x= -3
Answer:
48 children performing.
Step-by-step explanation:
Well all you do is divide 144 by 3 and you will get the answer of 48.