3. Eight is subtracted from a number, and then the difference is multiplied by 2. The result is 24. Find the number.

20

Step-by-step explanation:

We can quickly work this out by working backwards. If the difference was muliplied by 2 to get 24, there is only one number than can achieve this: 12. 12 x 2 = 24. Then because 8 was subtracted, we do the opposite and add it. 8+12=20

We can check this by starting with 20. If 8 was subtracted from 20 we get 12. Then if we multiply 12 by 2 we get 24. Therefore 20 is the correct answer.

180

step-by-step explanation:

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98