Which of the following is an open equation

5x+7=12

12+(-8)=4

25=5(5)

8+0=8

5x+7+12

Step-by-step explanation:

An Open Equation is basically an equation that has many variables that can be either true or false.  And they normally have a(n) mystery variable in them like x or y for example x+4=8.

You can tell by looking at the problems that three of them already have an answer set in stone for what times what equals what or what + what= what you know so using reasoning and deduction you will find out that your answer is 5x+7=12 because it has a mystery variable(x) letting you know that hey you can use more than one variable whether true or false to find out what times 5 plus 7 equals 12.

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horizontal translation of 2 units in the positive x direction

followed by

vertical translation of 3 units in the positive y direction