Question

The temperature of one furnace is 1,200 degrees Celsius and cools at a rate of 15 degrees Celsius per minute. The temperature of another furnace is 900 degrees Celsius and is heated at a rate of 5 degrees Celsius per minute. After how many minutes will the furnaces be the same temperature?



Equation: 1200-15x = 900+5x
(Show your work)

Answer 1

Answer:

15=x

Step-by-step explanation:

1# 1200-15x=900+5x

2# +15 to both sides      

3# 1200=900+20x

4# -900 on both sides

5# 300=20x

6# divide by 20 on both sides

7# 15=X