Cross multiplication is applied here.
Answer:
The solution is 
Step-by-step explanation:
we have

Solve for x
Distribute right side
Remember that



Combine like terms right side

Adds 80 both sides


Divide by 17 both sides

Rewrite

The answer for this problem would be 31
Answer:
50 cents per lollipop
Step-by-step explanation:
The full bag of lollipops costs 5.99 for 12 lollipops. You must use proportions.
5.99. _ X
———. ——
12. 1
Cross multiply to get 5.99 = 12x. Isolate the variable (x) by dividing by 12. 5.99/12 = 0.499166666666667
Because it is a price, round to the nearest hundredth and it costs about 50 cents per lollipop
Chance of getting a blue marble is 3/8