Question

Julie is x years old

David is 3 years older than Julie
Omar is twice as old as David

Write an expression for the sum of Julie, David and Omar's ages

Answer 1

x+x+3+2(x+3)


Julie is x

David is x+3

Omar is 2(x+3)

Answer 2

j=x
d=3+x
o=2d, o=2(3+x)=6+2x


j+d+o=x+3+x+6+2x=4x+9