Answer:
y=3/4x-4
Step-by-step explanation:
The form is y=mx+b so isolate y
-4y=16-3x
y=-16/4-3x/-4
y=3/4x-4
The
first choice gives you the same result. The factor of 5 can be removed to the outside of the summation symbol.
Each dog would weigh 30lbs. If the total is 60, and there are two to distribute the weight between, and one is twice the weight of the other, you get 60/2=30.
Let the number be a
6a - 20 = 3a + 4
Group like terms
6a - 3a = 20 + 4
3a = 24
divide through by 3
a = 8
Therefore the number is 8