Question

please answer im on an exam 20 points grade 7 math

5. Sam thought of a number, he tripled the number and subtracted 15 from it. then he divided the number by 3. His answer is 3, What was his number?

Answer 1

Answer:

Answering this question by backtracking the steps taken will be the most simple and easy way to get to the original number. First off, we know the final number is 4 after the “resulting number” was divided by 25. Therefore, that number must be 4 * 25 = 100. Now that we know that “resulting number” is 100, we should continue with this backtracking process, so instead of adding 20 like in the question, we will subtract 20, where 100–20 = 80. Finally, we should divide 80 by 2 as this action is the opposite of doubling a number, so 80 / 2 = 40. Therefore, 40 is the number that Monika thought of.

Answer 2

Answer:

8

Step-by-step explanation:

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