Question

Sendo a//b//c//d determine x,y,z

Answer 1

$\frac{x}{4} = \frac{y}{3} = \frac{21}{7}$

Resolvendo para x , temos:

$\frac{x}{4} = \frac{21}{7} \\ x = \frac{84}{7} = 12$

e resolvendo para y, temos:

$\frac{y}{3} = \frac{21}{7} \\ y = 9$