the cost of electricity from Electron is a flat rate of $500 plus $20/month. the cost of electricity from Vector is a flat rate of $400 plus $25/month at what point do the two companies have an equal cost
"500+20x=400+25x"
"5x=100"
"x=\\frac{100}{5}=20"
The two companies have an equal cost at 20 months.
Comments
Leave a comment