Monique J. answered 10/02/19
Tutor
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Patient and Knowledgeable 15+ Year HS Math Instructor/Numeracy Coach
You need to break down each piece of the problem.
"4 times" represents multiplication
"difference of a number and 7" = n - 7
When you put the two together you will have 4(n - 7)
"is" means "="
So 4(n - 7) = 12