Question

Resolva o sistema x - y = 4
X + y = 0

Answer 1

Resposta:

x - y = 4

Let's solve for x.

x−y=4

Step 1: Add y to both sides.

x−y+y=4+y

x=y+4

Let's solve for y.

x−y=4

Step 1: Add -x to both sides.

x−y+−x=4+−x

−y=−x+4

Step 2: Divide both sides by -1.

−y/−1=−x+4/−1

y=x−4

X + y = 0

Let's solve for x.

x+y=0

Step 1: Add -y to both sides.

x+y+−y=0+−y

x=−y

Let's solve for y.

x+y=0

Step 1: Add -x to both sides.

x+y+−x=0+−x

y=−x

Explicação passo a passo: