Answer:
C. 10 animals
Step-by-step explanation:
This is how i do it
(you just rearrange the number so the you can add the x's together)
15 + -5 = -2x + 3x
15 + -5 = 10
-2x + 3x = 1x or X
so you answer is:
X = 10
Step-by-step explanation
672
-4c + 5d
3 - 7 = -4, so c is equal to -4.
Since there is only one value for d, d stays the same as 5d.
I think it is B