Answer:
11 pounds
Step-by-step explanation:
Let the weight of Rover is x pounds.
As Fifi weighs 12 pounds less than Rover, so,
The weight of Fifi = x-12...(i)
As Fido weighs 26 pounds more then Fifi, so,
The weight of Fido = (x-12)+26=x+14.
As the sum of their weights is 71, so,
x+(x-12)+(x+14)=71
x+x-12+x+14=71
3x+2=71
3x=71-2=69
x=69/3
x=23
From equation (i), the weight of Fifi = 23-12=11 pounds.
Hence, the weight of Fifi is 11 pounds.
