Question

Rover weighs 5 pounds more than the neighbor’s dog. Rover is 7 years old, and the neighbor’s dog is 9 years old. Together they weigh 75 pounds. How much dose Rover weigh

Answer 1

Weight of Rover is 40 pounds

Solution:

Let "r" be the weight of Rover

Let "n" be the weight of nieghbour dog

Given that Rover weighs 5 pounds more than the neighbor’s dog

From this information, we can frame a equation as:

Weight of Rover = 5 + weight of Neighbour dog

r = 5 + n ---------- eqn 1

Also given that together they weigh 75 pounds

From this information, we can frame a equation as:

Weight of Rover + weight of Neighbour dog = 75

r + n = 75 ---------- eqn 2

Let us solve eqn 1 and eqn 2 to find the values of "r" and "n"

Substitute eqn 1 in eqn 2

5 + n + n = 75

5 + 2n = 75

2n = 70

n = 35

Substitute n = 35 in eqn 1

r = 5 + n = 5 + 35 = 40

r = 40

Thus the weight of Rover is 40 pounds