3

3x - 5 + x = 31

3x + x = 31 + 5

4x = 36

x = 36/4

x = 9

Added 7/16/2014 11:28:37 PM

This answer has been confirmed as correct and helpful.

3

3x + 2(4 + 6x) = 113

3x + 8 + 12x = 113

3x + 12x = 113 - 8

15x = 105

x = 105/15

x = 7

Added 7/16/2014 11:30:14 PM

This answer has been confirmed as correct and helpful.

3

3x + 6x^2 - 5x - x^2 = 5x^2 - 2x

Added 7/16/2014 11:31:05 PM

This answer has been confirmed as correct and helpful.

Confirmed by

yumdrea [7/16/2014 11:31:35 PM]