Question

y+4=x 1-y=x metodo sustitucion​

Answer 1

Explicación paso a paso:

Y+4=x

1-y=x

Y+4=1-y

Y+y=1-4

2y=-3

Y=-3/2

(-3/2)+4=x

X=5/2

1-(-3/2)=x

X=5/2