Question

I think of a number. If I multiply it by 5 and divide by 8 I get my answer 10. Form an equation and work out what number was I thinking off.​

Answer 1

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The answer is 25.

I solved this answer by going backward, using the problem. We will give the number value a variable since we don’t know the answer, this will be X.

*I use PEMDAS. When solve equations using any two subgroups (Adding and Subtraction, or Multiplication and Division), we will always start out left to right, Using the Multiplication/ Division signs first.

I will reverse the added value which is ‘adding five and multiplying 6’. Dividing cancels out the multiplication, so we will take the sum value (180) and divide it by 6. This will give us 30.

Once we got the multiplication out of the way, we will work on ‘add five’ value. Subtraction cancels out Addition, so well subtract 5 out of 30.

That leads the answer to be 25!