Question

Weight of cat+ dog= 32 , weight of dog+rat=27 and weight of cat+rat=19. find the weight og cat+dog?rat

Answer 1

CAT+DOG = 32
DOG + RAT = 27
CAT + RAT = 19

CAT+DOG = 32
DOG + RAT = 27
CAT = 19 - RAT


19 - RAT + DOG = 32
DOG = 27 - RAT
CAT = 19 - RAT


19 - RAT + 27 - RAT = 32
DOG = 27 - RAT
CAT = 19 - RAT

-2 RAT  + 46 = 32
DOG = 27 - RAT
CAT = 19 - RAT

- 2 RAT =  32 - 46 -> -RAT= -7
DOG = 27 - RAT
CAT = 19 - RAT

RAT= 7
DOG = 27 - RAT -> DOG =27 - 7
CAT = 19 - RAT -> CAT = 19 - 7

RAT= 7
DOG = 20
CAT = 12

Answer 2

Cat + Dog = 32 ...(1)
Dog + Rat = 27. ...(2)
Cat + Rat = 19. ...(3)
Subtracting (2) from (1)
We get,
Cat + Dog - Dog - Rat = 32 - 27
2 × Cat = 24
Cat = 12
Putting Cat = 12 in (3)
We get,
12+ Rat = 19
Rat = 19 - 12
Rat = 7
Putting Rat =7 in (2)
We get,
Dog + 7 = 27
Dog = 20
Cat +Dog + Rat = 39


Hope it will help u !!!!!