Question

qual o resultado do sistema
{x/2=2
{2x+3y=448

Answer 1

$\displaystyle \left \{ {{\displaystyle \frac{x}{2}=2} \atop {2x+3y=448}} \right.$

Se x/2 = 2, então:

$\displaystyle \frac{x}{2}=2 \\ \\ x=2 \cdot 2 \\ \\ x=4$

Daí temos:

$2x+3y=448 \\ \\ 2 \cdot 4 + 3y=448 \\ \\ 8+3y=448 \\ \\ 3y=448-8 \\ \\ 3y=440 \\ \\ y= \displaystyle \frac{440}{3} \\ \\ y \approx 146,666...$