More than one question. :]

[Tehborka]

5x + 3 = 2x + 15, what is x?

5x + 2 = x + 10, what is x?

6x - 8 + 2x - 5 = 7 - 2x, what is x?

9(x - 2) = 3(x + 2), what is x?

5(x + 4) = 7(x - 2), what is x?

 

[mmm4444bot]

Either you did not read the post titled "Read Before Posting", or you chose to ignore what it says.

Please do not post laundry lists of exercises with no work shown.

These boards are for helping students work through specific issues that they experience when trying to complete their homework; these boards are not an on-line classroom, and we don't do student's homework.

Please tell us what you already know about solving these types of exercises; show whatever work that you can, or explain what you're thinking, so that we have some way to determine WHERE to begin helping you.

Cheers ~ Mark

 

[Denis]

5x + 3 = 2x + 15, what is x?
5x + 2 = x + 10, what is x?
6x - 8 + 2x - 5 = 7 - 2x, what is x?
9(x - 2) = 3(x + 2), what is x?
5(x + 4) = 7(x - 2), what is x?

x is the 24th letter of the alphabet.

 

[mmm4444bot]

Yup, yup.

We can use any of the letters (both upper- and lower-case) from the English, Greek, and other languages as symbols to represent unknown numbers.

Sometimes, x turns out to be a constant (i.e., it is a single Real number).

Sometimes, x turns out to represent a set of two or more numbers (i.e., it is a variable because its value varies over all of those numbers in that set).

Sometimes, x turns out to be a variable that represents ALL Real numbers (i.e., it is infinity).

Sometimes, it turns out that x does not even exist !

 

[mmm4444bot]

Hi Tehborka:

In each of your exercises, x represents a constant. In other words, x turns out to be a single Real number, in each of the five exercises.

In fact, the five constants (one from each exercise) that x represents are in this set: {17, 4, 4, 2, 2}.

I was remiss to not previously post a link for THIS SITE, which gives several lessons on how to solve basic linear equations.

Once you're familiar enough with the concepts, you'll be in a position to design specific questions about that which you do not understand, or (better yet) to be able to show some work.

Feel free to tell us why you're stuck.

Cheers ~ Mark