how do you set the question up as an inequality?

Question

natalie and her sister are filling pools with water at the same time. natalie begins with 100 gallons and will add 10 gallons each hour. her sister begins with 25 gallons and will add 25 gallons each hour. when will natalie have less water in her pool than her sister?

Answer 1

h=# of hours

100+10h for Natalie

25+25h for her sister

25+25h>100+10h

25h-10h>100-25

15h>75

divide both sides by 15

h>5

after 5 hours they both have the same amount of water

after the sixth hour Natalie will have less water than her sister