If there are 2 cities and City 1 is 60 degrees and it rises by 2 degrees every hour and City 2 is at 40 degrees and rises at 10 degrees every hour when r same t

Question

This is an 8th grade math problem that I dont understand

Answer 1

2T+60 = 10T + 40

 

0 = 10T + 40 - 2T - 60

 

0 = 8T - 20

 

20/8 = T

 

5/2 = T

 

IN 5/2 hours or 2 and 1/2 hours or 2 hours and 30 min, the temperatures should be the same.

 

City 1 :  60 + 2 + 2 + 1 = 65   <--- half hour is 1/2*2 = 1 degree

City 2: 40 + 10 + 10 + 5 = 65  >--- half hour is 1/2*10 = 5 degrees