need help

Question

Marcus is eating a meal that is made up of an entrée that is 45 calories per ounce and a side dish that is 30 calories per ounce. He wants his meal to total 510 calories. Let e represent the number of ounces of the entrée that he eats, and let s represent the number of ounces of the side dish that he eats.

Which function relates the number of ounces of the side dish that he eats to the number of ounces of the entrée that he eats?

Answer 1

45e +30s=510

30s= 510 - 45e /30

s= 17 - 1.5e