Question 201451
D+G=15 OR D=15-G
2D+4G=48
2(15-G)+4G=48
30-2G+4G=48
2G=48-30
2G=18
G=18/2
G=9 NUMBER OF GOATS.
15-9=6 DUCKS.
PROOF:
9*4+6*2=48
36+12=48
48=48