Question

Resolva os sistemas:
A)
-3x +2y=11
x- 3y=-1​

Answer 1

Resposta:

Explicação passo-a-passo:

$\left \{ {{-3x +2y=11 *(1)} \atop {x- 3y=-1​*(3)}} \right. \\\\\left \{ {{-3x +2y=11 } \atop {3x- 9y=-3}} \right. \\\\-7y=8* (-1)\\y=-\frac{8}{7}\\\\x=-1+3y\\x=-1+3*(-\frac{8}{7})\\x=-1+\frac{24}{7}\\x=\frac{-7+24}{7}\\x=\frac{17}{7}$