Question

Gas cost three dollars per gallon diesel cost five dollars per gallon you have at most $43 to spend on fuel you must purchase the at least 8 gallons of gas for your car to run for the week let x Be the amount of gas purchased And y be the amount of diesel purchased what is the possible solution

Answer 1

3x+5y=43

x=8+y

3(8+y)+5y=43

24+3y+5y=43

8y=19

y=19/8 = 2.375

x=8+2.375 = 10.375

10.375*3=31.125

5*2.375=11.875

31.125+11.875 = 43

10.375 gallons of gas ( round to 10.38)

2.375 gallons of diesel (round to 2.38)