Problem 1 - Reverse method

I thought about a number, I would add it by 8, I would multiply it by 7, from the result I substract 72 and then we divided it to 12. Find out the number if I got the result 15.

Fill in here

Remember !

If the problems contain data that depend on each other then the reverse method is applied. The problem will be solved from the end to the beginning by performing the reverse operation.

Exemple !

I thought about a number, I would add it by 6, I would multiply it by 7, from the result I substract 69 and then we divided it to 17. Find out the number if I got the result 26.

We start with the last operation, the problem tells us that it was divided to 12 so we have to perform the reverse operation. In the same way we perform the reverse operation for the other operations.

17 x 26 = 442

442 + 69 = 511

511 ÷ 7 = 73

73 - 6 = 67

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