math

Question

i have a number "x" . i add 15 to twice "x" to get result A . i subtract 4 from "x" to get result "B" . i multiply result "B" by 3 to get result "c" result "A " is equal to result "C"

Fivejedjon · Accepted Answer

Have you a question for us?

Anonymous · Answer

In the problem statement you're given the following:

2x + 15 = A

x - 4 = B

3B = C

A = C

From these it then follows that:

C = A = 2x + 15

3B = 3(x - 4) = C

And then, from the above two equations:

2x + 15 = 3(x - 4)

So:

2x + 15 = 3x -12

x = 27

Checking (this is just as important as the calculations to get the answer, because it's very easy to make mistakes in this kind of problem):

A = 2x + 15 = 2(27) + 15 = 54 + 15 = 69

B = x - 4 = 27 - 4 = 23

C = 3B = 3(23) = 69

Thus, A = C, which checks with the original problem information.

CalifJim · Answer

Anonymous i have a number "x" . i add 15 to twice "x" to get result A . i subtract 4 from "x" to get result "B" . i multiply result "B" by 3 to get result "c" result "A " is equal to result "C"

You have a lot of mistakes.

The word I must always be capitalized.
The first word of each sentence must be capitalized.
A period must be placed directly after the last word of a sentence without spaces between.
In a math problem, you need to say what value is to be found. All you have is a bunch of statements that you claim, presumably, to be true, but you've said nothing about what to do with these facts.
__________

This is an English forum, not a math forum, so I hope you didn't expect us to do the math for you.

(x is between 20 and 40, though, if that's the value you're looking for.

)

CJ

Ah, well. Too late. Someone else has already spilled the beans. Put that answer in your homework and watch the surprise on your teacher's face. And then the teacher can watch the surprise on your face when he or she fails you for copying your answers from someone else.

CalifJim · Answer

AnonymousIn the problem statement you're given the following:2x + 15 = Ax - 4 = B3B = CA = CFrom these it then follows that:C = A = 2x + 153B = 3(x - 4) = CAnd then, from the above two equations:2x + 15 = 3(x - 4)So: 2x + 15 = 3x -12x = 27Checking (this is just as important as the calculations to get the answer, because it's very easy to make mistakes in this kind of problem):A = 2x + 15 = 2(27) + 15 = 54 + 15 = 69B = x - 4 = 27 - 4 = 23C = 3B = 3(23) = 69Thus, A = C, which checks with the original problem information.

I would like to know how this helps the student's English. All you've done is do the student's math homework for him without a word about grammar. This is, after all, an English grammar forum. It doesn't hurt to give a hint about the math if you know math, but it's not your problem to solve, and all you've done is deprive the student of the chance of working it out for himself.

CJ

Khoff · Answer

Even in math, you have to capitalize the pronoun "I".

CalifJim · Answer

khoffEven in math, you have to capitalize the pronoun "I".

Indeed. Otherwise, all you've got is the square root of -1.

CJ

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