84-18=66
66 divided by 11 =6
Jasmine can buy 6 pizzas and 1 cake with $84
Answer:
Step-by-step explanation:
The first step would be to add 7 to both sides.
3n-7=30
add 7
3n=37
divide by 3
n=12.33
Answer:
The cost of the mug is of $6.50.
Step-by-step explanation:
The cost of the mug and r refills is given by the following equation:

Cost of the mug:
The cost of the mug is found when no refills are bought, that is, C when
, which is 

The cost of the mug is of $6.50.