Question

resolva o sistema de equaçoes 2×+y=10 3×-2y=1

Answer 1

$\left \{ {{2x\ +\ y\ =\ 10 \ \cdot2} \atop {3x\ -\ 2y\ =\ 1 }} \right.\\ \\ {}{}{}{}{}{}{}{}{} \ \Downarrow \\ \\ \left \{ {{4x\ +\ 2y\ =\ 20} \atop {3x\ -\ 2y\ =\ 1}} \right.\\ \\ 7x = 21\\ x = \frac{21}{7}\\ x = 3\\ \\ 2x + y = 10\\ 2.3 + y = 10\\ 6 + y = 10\\ y = 10 - 6\\ y = 4$

Resposta: x = 3; y = 4