Question

15. Solve 9x + 9 = 9 for x. (Points : 1)
-2
-1
0
1


16. Solve 7x + 18 = 4 for x. (Points : 1)
-2
-1
0
1


17. Solve –3x – 2 = –11 for x. (Points : 1)
-2
-3
2
3

Answer 1

9x + 9 = 9 --> 9x = 9 - 9 --> 9x = 0 --> x=0

7x + 18 = 4 --> 7x = -14 --> x = -2

–3x – 2 = –11 --> -3x = -9 --> 3x = 9 --> x = 3

Answer 2

9x + 9 = 9 --> 9x = 9 - 9 --> 9x = 0 --> x=0

7x + 18 = 4 --> 7x = -14 --> x = -2

–3x – 2 = –11 --> -3x = -9 --> 3x = 9 --> x = 3

Answer 3

9x + 9 = 9 --> 9x = 9 - 9 --> 9x = 0 --> x=0
7x + 18 = 4 --> 7x = -14 --> x = -2
–3x – 2 = –11 --> -3x = -9 --> 3x = 9 --> x = 3