Question

x+2y=3
2x-3y=5
Sistema de equação do primeiro grau

Answer 1

Resposta:

x+2y=3

2x-3y=5

$x=3-2y\\\\2.(3-2y)-3y=5\\6-4y-3y=5\\6-7y-5=0\\1-7y=0\\-7y=-1.(-1)\\7y=1\\\\y=\frac{1}{7} \\\\x=3-2.\frac{1}{7} \\\\x=19/7\\\\(x,y)=(\frac{19}{7},\frac{1}{7})$