Question

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Answer 1

Answer:

When 9 is subtracted from a number and then divided by 2, the answer is 4. What is the number?

You need to decode the sentence into an equation first, then solve the equation.

For every unknown number or value, you replace with a variable

“9 is subtracted from a number and then divided by 2 the answer is 4”

Let’s take this a part at a time:

“9 is subtracted from a number” -> x - 9

“and then divided by 2” -> (x-9)/2

“the answer is 4” -> (x-9)/2 = 4

2. Using algebra to solve for x

(x-9)/2=4 -> x-9=8 -> x=17

So 17 is your answer. Let’s check if it’s right.

“9 is subtracted from 17” => 8

“divided by 2” => 4

“answer is 4”. yep. Checks out.

Answer 2

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