1. Which of the following is an example of an open equation?

A. 5x + 7 = 12

B. 12 + (-8) = 4

C. 25 = 5 (5)

D. 8 + 0 = 8

2. Which of the following equation has 3 as a solution?

A. - 2B = 6

B. 4a - 5 = 12

C. 5Y = y + 8

D. z - 15 = - 12

2/3x=-12 what is the awnser to this question

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I am confused. What does - - (-8) (-8) (5) (5) (-8) equal?