Answer:
Sven's orders=220 orders
Tina's orders=250 orders
Laurie's orders=270 orders
Explanation:
We can derive the following expressions from the information given;
Total orders per day=Sven's orders+Tina's orders+Laurie's orders
where;
Total orders per day=740
Sven's orders=s
Tina's orders=t
Laurie's orders=l
replacing;
Total orders per day=s+t+l
s+t+l=740....equation 1
Total order(Sven and Tina)=Sven's orders+Tina's orders
where;
Total order(Sven and Tina)=470
Sven's orders=s
Tina's orders=t
replacing;
Total orders per day=s+t
s+t=470....equation 2
Total order(Tina and Laurie)=Tina's orders+Laurie's orders
where;
Tina's orders=t
Laurie's orders=l
replacing;
Total orders per day=t+l
t+l=520....equation 3
All the equations are as follows;
s+t+l=740....equation 1
s+t=470....equation 2
t+l=520....equation 3
Replace the value of t+l in equation 1 with 520
s+520=740
s=740-520
s=220
Replace the value of s in equation 2 with 220
220+t=470
t=470-220
t=250
Replace the value of t in equation 3 with 250
250+l=520
l=520-250
l=270
Sven's orders=s=220 orders
Tina's orders=t=250 orders
Laurie's orders=l=270 orders