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# Unknown variable problems

0
21
14

A. 18

B. 36

C. 24

D. 72

Aug 19, 2023

#1
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72 – x  =  n         (1)

36 – x/2  =  n      (2)

Subtract (2) from (1)                                36 – x/2  =  0

x/2  =  36

x  =  72

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Aug 20, 2023
#2
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I have not looked at the answer I am just editing to get rid of the unacceptable language .. Melody.

Guest Aug 20, 2023
edited by Guest  Aug 20, 2023
edited by Melody  Aug 25, 2023
#4
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Normally, I wouldn't bother with an unsubstantiated claim like this,

but there isn't anything good on television right now, so why not.

The problem gives four answers to choose from.

Let's try all of them.

72 – 18 = 54     36 –   9 = 27      Same number left over?  No.

72 – 36 = 36     36 – 18 = 18      Same number left over?  No.

72 – 24 = 48     38 – 12 = 26      Same number left over?  No.

72 – 72 =   0     36 – 36 =   0      Same number left over?  Yes

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Bosco  Aug 20, 2023
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@IQantCorrectAnser    Indeed, there might be something wrong with the question, but there's nothing wrong with my answer to the problem stated in this thread.  Maybe the problem on the Staar test says something different and the OP copied it incorrectly.  OP means Original Poster.

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Bosco  Aug 20, 2023
#10
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I am not familiar with the staar exam, but my review of Bosco's answer is that Bosco got the question right given his or her interpretation of this word problem. You all are claiming that A. 18 is the right answer without any explanation.

The3Mathketeers  Aug 21, 2023
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All of you guys are wrong! The answer is actually D. 72. Bosco you're actually correct. The guest is just a troll and has no idea what he's saying. Therefore, the answer is still 72. I just found it out.

mmoh1771  Aug 21, 2023
edited by mmoh1771  Aug 21, 2023
#3
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Jessica sold 72 - 36 = 36 cookies. Since Max only baked 36 cookies, they must have sold the same number of cookies, so Jessica sold 18 cookies. The answer is A. 18.

Such a hard word problem.

Aug 20, 2023
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They didn't sell the same number of cookies.

The problem says Max sold half as many as Jessica.

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Bosco  Aug 20, 2023
#11
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This answer makes no sense. Your first sentence claims that Jessica sold 36 cookies and then you conclude somehow that Jessica sold 18 cookies. That is a major contradiction.

The3Mathketeers  Aug 21, 2023
#13
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Start with your variable, x. Now begin writing an equation. We start with 72 - since Jessica baked that amount. After she sold x cookies, she had some amount left (so, we have 72 - x =), which is supposedly equal to the amount Max had left, thus the same things go for Max, so we have 72 - x = 36 - x/2.

Adding x to both sides, we get 72 = 36 + x/2, and subtracting 36 from both sides we get 36 = x/2. Multiplying by two we get 72 = x. Thus, the answer is D. 72. And Bosco is correct.

Aug 22, 2023