December 2019 1 20 Report
Determine o valor de x e y em cada igualdade.

A) (x, y)=(6, -2)

B) (x +2, y - 3)=(7, -6)

C) (2 x +1, y+2)=(10, 5)

D) (x + 4, x-2 y)=(4, 1)
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