Problema Solution
On October 1, 2008 blakes gas station sold regular gas for $3.10 per gallon and premium gas for $3.30 per gallon. At the end of the day the receipts showed that 890 gallons of gas had been sold for a total of $2781.00. How many gallons of each gas had been sold?
Answer provided by our tutors
let regular gas X and cost is 3.10
Premium gas Y and cost is 3.30
Total gas sold 890 gallons which can be written as X+Y=890 i.e X=890-Y
Toatl gas sold in $ is 3.10X+3.30Y=2781
sustituting value of X we get
3.10(890-Y)+3.30Y=2781
2759-3.10Y+3.30Y=2781
0.20Y=22
Y=110
X=890-110=780