MT Schull said:Kevin has pheasants and rabbits. He has a total of 42 heads and 138 legs. How many pheasants and rabbits does kevin have?
MT Schull said:2p + 4r = 138
p = 42 - r
Is this correct? Yes
Include definitions for symbols p and r, when you turn in your work.
I see that you checked your solution. That's smart.
r = 27
2p + 4(27) = 138
Instead of going back to this equation, to determine p, here's another approach.
You already wrote a formula for p in terms of r (above). Now that you know r = 27, you can use that formula.
p = 42 - r
p = 42 - 27