Answer: The answer is 8 units
Step-by-step explanation:
Answer:
x = -10
Step-by-step explanation:
9 x -10 = -90
In order to find out the answer , you just need to count :
Let's say that mary's collection is symbolized by x
2/3 x = 4h
x = 3/2 . 4h
x = 6h
The storybooks they have in total would be : 6h + 4h = 10 h
hope this helps