Your mom's
garden watering
barrel had 12
gallons of water
in it. while
raining, it fills up
with 5 gallons of
water every
hour.

If you wanted to write an equation it would be:

12 + 5h = g

-h representing the hours

-g representing gallons of water

(you don't have to use those variables, just for a reference)

So if you want to know how many gallons there would be after a certain number of hours, just plug the number in where h is and solve.

Example:

10 hours

12 + 5(10) = g

12 + 50 = g

g = 62

62 gallons of water after 10 hours

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^