# How do you find the cost of a gallon of water if the cost of a gallon of milk is $0.50 more than five times the cost of a gallon of water and if a gallon of milk costs $3.75?

##### 1 Answer

A gallon of water costs

#### Explanation:

Problems like this can be confusing because it's hard to figure out how to express amounts like "$0.50 more than five times the cost of a gallon of water."

The trick is to write the math expression one step at a time.

**Find a way to express the cost of a gallon of milk**

Let

Cost of water . . . . . . . . .

**Write the equation and solve for #x#**

Solve for

1) Subtract

2) Divide both sides by

**Answer**

A gallon of water costs

**Check**

50ȼ more than that . .. .