Question

During a hike, Vijay saw a total of 19 birds and butterflies. Knowing that birds have 2 wings and butterflies have 4 wings, he counted 52 wings. Use a model to determine how many birds he saw.

A. 9

B. 10

C. 11

D. 12

Answer 1

let x the number of birds and y the number of butterflies --->
x+y = 19
2x+4y =52

Answer 2

y=7 ,x =12

Answer 3

system ...remember ?

Answer 4

So, he saw 12 birds. Thanks :-)

Answer 5

yep