Question

EQUAÇÃO DO SEGUNDO GRAU... Resolva o sistema abaixo:

{X+Y=3/2
X-Y=1/2

Answer 1

{X+Y=3/2 .....X = 3/2-Y
X-Y=1/2

3/2-Y-Y=1/2

3/2-2Y=1/2

3/2-1/2=2Y

2/2=2Y

1=2Y

½=Y

 

X+Y=3/2

X+1/2=3/2

X=3/2-1/2

X=2/2

X=1