Question

At a family reunion, there only blood relatives, consisting of children, parents, and grandparents, in attendance. There were 400 people total. There were twice as many parents as grandparents, and 50 more children than parents. How many children, parents, and Grandparents were in attendance?

Applying the Solution to a 3X3 System
Show up all steps please

Answer 1

let x= children, y = parents, z= grandparents.
our equation now looks like
y = 2z, x=y+50 and xty+z= 400.

× = 190
y= 140
z= 70