Question

Marcia can make 5 candles in an hour. Kevin can make only 4 candles in an hour, but he already has 7 completed candles. Explain to Marcia how she can use a system of equations to determine when she will have the same number of candles as Kevin. Use complete sentences

Answer 1

M(Marcia)= 5h (5 candles per hour)
K (Kevin)= 4h +7 (4 candles per hour plus 7 completed)

M=5h
K=4h+7
So when will she have the same number as Kevin?
When M=K
So 5h = 4h+7
-4h -4h
h = 7
Sooooooooo 7 hours