Question

Determine os valores de x e y:
$\left \{x+y = 7} \atop { \frac{x}{y}= \frac{11}{3} } \right.$

Answer 1

x = 11y/3, substituindo na soma:
11y/3 + y = 7
(11y + 3y)/3 = 7
14y = 7.3
14y = 21
y = 21/14 (/3)
y = 3/2 ====>>>> x = 11y/3 => x = 11/3.3/2 => x = 11/2