Did I understand correctly, the first number is:

?
in other words, this would be:

and if you drink half of it, then we divide this number by 2:

because 30/2=15
so you would have

still more than a daily dose!
Answer:
16 books are math books. 12 are science books. 44 are romance novels.
Answer:
y = 3/2x - 4
Step-by-step explanation:
First answer: x = 3
How?
3x - 7 = 2
3x = 2 + 7
3x = 9
x = 9/3
x = 3
Second Answer:= x=5
How?
3 + 2x - (x + 1) = 3x - 6
-3x + 2x - x = -6 - 3 - 1
-2x = -10
x = 5
Answer:
37
Step-by-step explanation:
LMN is one big line
LM=22
LM=15
LN=22+15=37