Question

Determine o valor de x e de y nos pares ordenados.
f)(x-2,5-y)=(2x+y)

Answer 1

(x-2.5-y)=(2x+y)
x-2.5-y=2x+y
x-2x=y+y+2.5
-x=2y+2.5 (-1)
x=-2y-2.5

(-2y-2.5)-2.5-y=2*(-2y-2.5)+y
-2y-2.5-2.5-y=4y-5+y
-2y-y-5=4y+y-5
2y-y-4y-y=-5+5
-4y=0 (1)
4y=0
y=0/4
y=0

x=-2*0-2.5
x=-2.5