A faraway planet is populated by creatures called Jolos. All Jolos are either
green or purple and either one headed or two-
headed.
Balan, who lives on this planet, does a survey and finds that her colony of 725
contains 145 green, one-headed Jolos; 240 purple, two-headed Jolos; and
350 one-headed Jolos.
One-headed Two-headed Total
Green
145
Purple
240
Total
350
725
How many green Jolos are there in Balan's colony?