SOLUTION: Problem: 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?
please solve this que
Algebra.Com
Question 977689: Problem: 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?
please solve this question.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
b+d=7
4d+2b=20
b=7-d
4d+2(7-d)=20
4d+14-2d=20
2d=6
d=3
b=4
check
4*2+3*4=20
8+12=20
ok
RELATED QUESTIONS
There are some men and buffaloes at a place. The number of heads is 15 and the total... (answered by ikleyn)
there are some men and buffaloes at a place.number of heads are is and total number of... (answered by ikleyn)
There are some men and buffaloes at a palce .if total number of heads are 15 and total... (answered by Boreal)
A group of dogs and ducks have a total of 99 heads and legs among them. There are twice... (answered by stanbon,benazir.sj@gmail.com)
The ratio of boys to girls at a college is 4 : 5. How many boys and girls are there if... (answered by rfer)
In Aunt Melly’s attics there are also spiders and ants, the total of 136 legs and 20... (answered by Boreal)
Charlie has 11 animals at home, consisting of dogs and parrots. If there are 38 legs... (answered by saifoo.khan,stanbon)
There are double the number of boys playing basketball as girls. If there is a total of... (answered by Theo)
ANIMALS The total number of cats and dogs at the shelter is 125. There are 5 more cats (answered by math_tutor2020,greenestamps,ikleyn,josgarithmetic)