I buy 20 gallons of gas, 15 premium and 5 regular. Regular gas is 20 cents cheaper per gallon. I spend $42 total; what is the price of each type of gas?

Question

I buy 20 gallons of gas, 15 premium and 5 regular.  Regular gas is 20 cents cheaper per gallon.  I spend $42 total; what is the price of each type of gas?

Reiny · Answer

solve 15x + 5(x-20) = 4200 You must live in Utopia.