Question

Resolva o sistema linear 2x + 3y= 5 2x - y = -4

Answer 1

Resposta:

$\left \{ {{2x+3y=5} \atop {2x-y=-4*(-1)}} \right. \\\\2x-2x+3y+y=5+4\\4y=9\\\boxed {y=\frac{9}{4}}\\\\2x+3*(\frac{9}{4})=5\\2x+\frac{27}{4}=5\\8x+27=20\\8x=20-27\\8x=-7\\\boxed {x=-\frac{7}{8}}$

Explicação passo-a-passo: