What makes the open sentence 7x - 7 = 2x + 8 true a. x = 0 b. x = 1 c. x = 3 d. x = 4

Remark

That is a lot of points. 8 would do the trick to get our attention.

There are 2 ways that you can handle this question. You could just try each one of the numbers to see which value of x gives you a solution to the problem. I think you will find it is C

21 - 7 = 14

3*2 + 8 = 6 + 8 = 14

Or you could use algebra to find it.

7x - 7 = 2x + 8       Add 7 to both sides

7x - 7 + 7 = 2x + 8 + 7

7x = 2x + 15            Subtract 2x from both sides.

7x - 2x = 2x - 2x + 15

5x = 15                     Divide by 5

5x/5 = 15/5

x = 3

What you use depends on what grade you are in. Check back by leaving a comment so I can see it if you want more

.

is this part of a question or something