Question

10x + 20y = 8
× + y = 110

- sistema de equação

Answer 1

$\left \{ {{10x+20y=8} \atop {x+y=110}} \right.$

x+y=110
x=110-y

10(110-y)+20y+8
1.100-10y+20y+8
30y+8-1.100
30y=-1.092
y=-1.092/30
y=-36,4