The map shows the distances that three friends live from the library. Lorrain
12.5 cm

Noah
6.3 cm

Jamal
7 cm

Scale: 3 cm = 2 km

Determine the actual number of kilometers that each friend lives from the library. Round answers
to the nearest tenth, if necessary.

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.