Question

valor de x em : 
 
3/5 = x+1/21

Answer 1

$\frac{3}{5} = x + \frac{1}{21}$

$\frac{63 = 105x + 5}{105}$

$105x = 63-5$

$105x = 58$

$\boxed{x = \frac{58}{105}}$

ou

$\frac{3}{5} = x+ \frac{1}{21}$

$3 = 5(x+ \frac{1}{21})$

$3 = 5x + \frac{5}{21}$

$\frac{63 = 105x + 5}{21}$

$105x = 63-5$

$105x = 58$

$\boxed{\boxed{x = \frac{58}{105} }}$

Espero ter ajudado. :))