I want to say -1. if you first combine like terms the equation would look like 2-2x. then next step i did was divide both sides by negative 2 to get the x by itself. after i did that i got -1 x.
Divide 19.99 / 3
Get 6.663
Round to 6.66
Unit rate for 3 pizzas at 19.99 is 6.66
this is the answer hope it helps you
