Answer:
First blank is 15.
Second blank is 60.
Third blank is 8.

Step-by-step explanation:
To clear the fractions, multiply both side by the least common multiple (or a common multiple) of the denominators you see.
The least common multiply of 4 and 5 is 4(5)=20.
So multiply both sides by 20:


Simplify:


First blank is 15.
Second blank is 60.
Third blank is 8.
Answer: 72 minutes
Step-by-step explanation: 84/7=12. 12x6=72.
Answer:
"C" =14
Step-by-step explanation:
14+(-12)=-12+c
-12+c=14+(-12)
-12+c=14-12
-12+c+12=2+12
c=14
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