When it tells us to write in the simplest terms, that means to combine like terms!
For example,
4x and 2x are like terms
and 9 and 7 are like terms!
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let's combine them!
(-4x) + (-2x) = -6x
(-9) + (-7) = -16
When we put these two terms together, we get the answer ...
-6x - 16
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Hope I helped! Comment if you have any questions about my answer!
-Gabby5792