Question

There are some boys and dogs at a place.If total number of heads is 7 and total number of legs is 20, how many boys and how many dogs are there

Answer 1

Answer:

Step-by-step explanation:

b+d=7

4d+2b=20

b=7-d

4d+2(7-d)=20

4d+14-2d=20

2d=6  

d=3

b=4

4*2+3*4=20

8+12=20