Question

Calcule: - X + Y/3 = 2 2X + Y = 1 O valor de X é: A) 2; B) -1; C) -2; D) 1/2; E) -1/2.

Answer 1

Ola alexandre

-x + y/3 = 2
2x + y = 1

-3x + y = 6
-2x - y = -1

-5x = 5

x = -1 (B)

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