Respostas
Resposta:
x+y=14 2x+y=3 x+3y=19 6x+4y=80
x-y=16 4x+3y=7 3x+y=9 10-4y=-10
2x =30 y= 3-2x y=9-3x 7x = 70
x=30/2 subst valor de x x = 10
x=15
x-y=16 4x+3(3-2x)=7 x+3(9-3x)=19 x-4y=-10
15-y=16 4x+9-6x=7 x+27-9x=19 10-4y=-10
-y=16-15 -2x = 7-9 x-9x=19-27 4y=20
-y=1 -2x=-2 -8x = -8 y=20/4
y=-1 x=1 x=1 y = 5
2x+y=3 3x+y=9
2*1+y=3 3+y=9
2+y=3 y=9-3
y = 3-2 y = 6
y=1
Explicação passo a passo: