Question

What does x represent for these 4 problems?

1. -2x = 10
2. ½x = 5
3. 5x = -20
4. 9x = 36

Answer 1

1.

-2x = 10

x = 10/(-2)

x = -5

2.

1/2 x = 5

x = 5 * 2

x = 10

3.

5x = -20

x = -20/5

x = -4

4.

9x = 36

x = 36/9

x = 4