Question

Resolva:
2 (x-5) = 1/5

Answer 1

2x - 10 = 1/5
2x = 1/5 + 10 (×5)
10x = 1 + 50
x = 51/10
x = 5,1

Answer 2

$2(x - 5) = \frac{1}{5} \\ 2x - 10 = \frac{1}{5} \\ 2x = \frac{1}{5} + \frac{10}{1} \\ 2x = \frac{51}{5} \\ x = \frac{51}{5} \div \frac{2}{1} \\ x = \frac{51}{10}$