Question 378544
It took 7 3/4 gallons of gas to fill the tank of the family car. 
If the tank was 1/8 full when they arrived at the gas station how much gas does the tank hold?
:
Change 7{{{3/4}}}  to {{{31/4}}} gal
:
Let x = no. of gallons the tank can hold
:
x = {{{1/8}}}x + {{{31/4}}}
Multiply by 8, results
8x = x + 2(31)
8x - x = 62
7x = 62
x = {{{62/7}}}
x = 8.857 gal, the tank will hold 
:
:
see if that is true using a calc,
 enter {{{1/8}}}*8.857 + {{{31/4}}} results: 8.857