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1 answer:
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The Brady family received 1 letter on July 28.
Step-by-step explanation:
Step 1:
Assume a = the number of letters, b = the number of bills, c = the number of ads, and d = the number of magazines.
From the question, they got 15 pieces of mail that day so
They got 5 more magazines than bills so
The got the same number of letters as ads so
They got 3 more bills than ads so
Step 2:
As we have only one equation to solve the values, we need to make every term in terms of a single term.
We make everything in terms of c.
So
Substituting all this in the equation, we get
Step 3:
Substituting c = 1 in other terms, we get
and
As a = 1, they received 1 letter that day.