Question

The distance from your house to the ice cream shop is 12 miles. Your best friends house is on the segment between your house and the ice cream shop, and his house is 3 miles from the ice cream shop. How many miles is your house from your best friends house?

Answer 1

see attachment

distance from ice cream to your house=distance from ice cream to friend+distance from friend to your house

distance from ice cream to your house=12
distance from ice cream to friend=?
distance from friend to your house=3

12=?+3
minus 3 both sides
12-3=?+3-3
9=?+0
9=?

answer is 9 miles