Question

sendo a// b//c, calcule x e y.

Answer 1

Vamos lá Ellena,
$a)\\ \text{calculo de x:}\\ \\ \frac{x}{14}=\frac{4}{7}\\ \\ 7x=14\cdot{4}\\ \\ x=\frac{56}{7}\\ \\ \boxed{x=8} \\ \text{calculo de y:}\\ \\ \frac{y}{3}=\frac{14}{7}\\ \\ 7y=14\cdot{3}\\ \\ y=\frac{42}{7}\\ \\ \boxed{y=6}\\ \\ b)\\ \text{calculo de x:}\\ \\ \frac{x}{21}=\frac{10}{14}\\ \\ 14x=21\cdot{10}\\ \\ x=\frac{210}{14}\\ \\ \boxed{x=15}\\ \text{calculo de y:}\\ \\ \frac{y}{4}=\frac{21}{14}\\ \\ 14y=4\cdot{21}\\ \\ y=\frac{84}{14}\\ \\ \boxed{y=6}$

Espero ter ajudado :)