Question

Sam ran several errands and used 7 gallons of gas. There were 5 gallons left in the tank. (Use g as a variable.)

Answer 1

`g= 2`

Explanation:

Given

`Used = 7`

`Left = 5`

Required

Determine the additional gallons used (g)

This is calculated as:

`Left+ g= Used`

So, we have:

`5 + g = 7`

Make g the subject

`g = 7 - 5`

`g= 2`