Question

During a hike, Vijay saw a total of 13 birds and butterflies. Knowing that birds have 2 wings and butterflies have 4 wings, he counted 46 wings. How many birds did he see?

A. 1
B. 3
C. 6
D. 8

Answer 1

x=birds
y=butterflies

x+y=13
2x+4y=46

so... x=13-y
2(13-y)+4y=46
26-2y+4y=46
2y=20
y=10

x=13-10
x=3

3 birds