Question

if you're gas tank read 1/3 full and added 10 more gallons and read 3/4 full, how much more do you add to get a full tank?

Answer 1

write down the math version of
1 / 3 (of a tank) and added 10 gals

1 / 3 T + 10
and that equals 1 / 4 of a tank

so
1 /3 T + 10 = 3 /4 T