Question

1/5 (2x-1)=4x                                         xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Answer 1

1/5 (2x-1)=4x     
2x/5  - 1/5 = 4x   /*5 
2x - 1 = 20x 
2x - 20x = 1 
- 18x = 1 
x = - 1/18 

Answer 2

$\frac{1}{5} (2x - 1) = 4x \\ \\ 5 \times \frac{1}{5} (2x - 1) = 5 \times 4x \\ 2x - 1 = 20x \\ 2x = 20x + 1 \\ 2x - 20x = 1 \\ - 18x = 1 \\ x = - \frac{1}{18}$