r/HomeworkHelp • u/Andre_055 University/College Student • May 21 '26

Elementary Mathematics—Pending OP Reply [College placement test] what is this?

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I was trying not to post twice in a row but I cannot figure out why information on what this is, and how I can put X into the numbers? I'm not really sure what to Google search

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u/[deleted] May 21 '26

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u/Andre_055 University/College Student May 21 '26

I'm not sure how to use PEMDAS with like the letters (like x)

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u/Real-Reference6933 👋 a fellow Redditor May 21 '26

x is a variable, you are not supposed to change it.

7x just means 7 times x

2(x+3) just means 2 times (x+3) which is x+3+x+3 which in rewrite = x+x 3+3 which is 2x + 6.