Victoria T.

asked • 02/23/16

9 + 12 / 2 x 2

I'm faced with adding parentheses to find the solution. However, the solution that I came up with was incorrect. Using PEMDAS, I placed the parentheses around 2 x 2, making the equation: 9 + 12 / 4. After that, I solved 12 / 4, getting 3, final answer being 9 + 3 = 12. When I compared my answer to the correct answer, the solution ended up being 21, as the author placed parentheses around 12 / 2, multiplied that by 2, and added 9. Which is truly correct?

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