Answer:
Marco folds 20 Jess folds 40
Step-by-step explanation:
m=napkins marco folds and j= napkins jess folds
Set up a system of equations
60=m+j
m+20=j
Solve for one variable then substitute it back into equation to solve for its value
m=60-j
(60-j) +20= j
2j=80
j=40
Substitute j to find m
60=40+m
m= 20
