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:

1200-15x=900+5x

1200-900=5x+15x

300=20x

x=15°