Question

|2x - 3| = 7

Answer 1

Case I

2x - 3 = 7

2x = 10

x = 5

Case II

- (2x-3) = 7

2x - 3 = -7

2x = -4

x = -2

Answer 2

yahoo is correct but that does not explain how you can do that


you have

|2x - 3| = 7

you know that |7|=7
but you also know that |-7|=7

so this shows that 2x-3 my be 7 or -7
this allows you to create two equations

2x-3=7

2x-3=-7