Answer:
4.5 gallons
Step-by-step explanation:
3 is 70 y is 105
multiply 3 and 105 and 70 and y
3x105=315
70xy=70y
y=315:70=4.5
sorry I don't know how to explain it very well
x = 4.5 gallons
1.) Find how many miles you get per gallon
miles/gallon = 70 miles/3 gallons = 70/3
2.) Set up a proportion and solve
70/3 * 105 / x
(105*3) / 70 = x
315 / 70 = x
x = 4.5
Hope this helps,
- J.M.Jamon
Pennsylvania State University
Full-time B.S.CE. undergrad student
