SOLUTION: I need to translate each sum sentence into an equation. then find each number Mary is 30 years old. this is 5 less than 7 times her son's age.

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Question 230067: I need to translate each sum sentence into an equation. then find each number


Mary is 30 years old. this is 5 less than 7 times her son's age.
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = the son's age
7x-5 = Mary's age

Since Mary's age is 30,
7x-5=30

Add +5 to each side:
7x-5+5=30+5
7x=35
x=5 Son's age
7x-5= Mary's age
7*5-5= 35-5=30 It checks!!

Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus