Question

Ramon was studying pond life in Doyle Park. In two hours, he counted four more frogs than turtles. The number of crayfish he counted was three more than twice the number of turtles. In total, he counted 54 turtles and crayfish. How many frogs were there?

Answer 1

turtles=x
frogs=x+4
crayfish=3+2x

54=x+(3+2x)
54=3+3x
51=3x
x=17

frogs=x+4
=17+4
There were 21 frogs