Question 994591
in a mixture of concrete there are three lb of cement mix for each pound of gravel .if the mixture contains a total of 76 lb of these two ingredients how many pounds of gravel are there?
let x=amt of gravel in mixture
76-x=amt of cement in mixture
(76-x)/x=3
3x=76-x
4x=76
x=19
76-x=57
amt of gravel in mixture=19 lbs