Ok is there any additional information?
There is no story but i think they felt mad
The animals that are being sampled are can die if the sample is not made with properly
A noun phrase denoting a person or thing that is the recipient of the action of a transitive verb, for example the dog in Jimmy fed the dog.
Hope this helps!
3x + 7 = x - 15
First, make sure to subtract

from both sides.
Second, simplify 3x - x to get 2x, and then keep the 7.
Third, subtract

from both sides.
Fourth, simplify -15 - 7 to get -22.
Fifth, take the 2 and divide both sides by it, keeping the

by itself.
Sixth, since 11 goes into 2 to get 22, simplify the fraction to 11.

Answer:
x = -11