Question

10 x =30 +80 

 

2 x + 10=2x 20 

 

3x+2= x + 8 

 

 x = 3

5     x

 

4x + 3+2x =13+2x = 4x 

Answer 1

10x = 30 + 80         2x + 10 = 2x 20                 3x + 2 = x + 8         4x + 3 +2x = 4x
10x = 110               2x = 40x - 10                     3x - x = 8 - 2               6x = 4x - 3
x = 110/10             2x - 40x = -10                     2x = 6                         6x - 4x = -3
x = 11                       - 38x = -10                         x = 6/2                      2x = -3
                                    x = 10/38                        x = 3                         x = -3/2
                                    x = 5/19