Question

Hello, I need help completing this problem. Thank you so much.

Answer 1

Let

x ----> orders served by Kala

y ----> orders served by Abdul

z ---> orders served by Joe

we have that

x+y+z=71 -----> equation A

x=y-5 -----> equation B

z=2y -----> equation C

solve the system

substitute equation B and equation C in equation A

so

(y-5)+y+(2y)=71

solve for y

4y-5=71

4y=71+5

4y=76

y=19

Find out the value of x

equation B

x=19-5=14

Find the value of z

equation C

z=2(19)=38

therefore

Lala served 14 orders

Abdul served 19 orders

Joe served 38 orders