Hi there,

I would like to know the simplest process to resolve this DS. Explanation is requested.

A contractor combined x tons of a gravel mixture that contained 10 percent gravel G, by weight, with y tons of a mixture that contained 2 percent gravel G, by weight, to produce z tons of a mixture that was 5 percent gravel G by weight. What is the value of x ?

(1) y = 10
(2) z = 16