Question

Sistemas
10x+20y=110
X+Y=8

Iae resolve pra eu??

Answer 1

10x+20y=110
X+Y=8 ------- pela substituição

x=8-y

10.(8-y)+20y=110
80-10y+20y=110
10y=110-80
10y=30
y=3

x=8-3
x=5