Together the pets weighed 40 pounds but the dog is four times as much as the cat. How much did the dog weigh?

8 pounds

Step-by-step explanation:

Let’s take d as dog and c as cat

So

D+c=40

And c=4d

Let’s substitute “c” as 4d

d+4d=40

5d=40

d=8

The dog weighs 8 pounds and cat weighs 2 pounds

Hope this helps

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.