Anniversary age calculation

Mr. and Mrs. Smith announce the celebration of their 190th anniversary - that's how many years they've been together this year. How old are Mr. Smith and Mrs. Smith if we know that Mr. Smith is nine years older than Mrs. Smith?

Final Answer:

a =  99.5
b =  90.5

Step-by-step explanation:


a+b = 190
a = 9+b

a+b = 190
a-b = 9

Row 2 - Row 1 → Row 2
a+b = 190
-2b = -181


b = -181/-2 = 90.5
a = 190-b = 190-90.5 = 99.5

a = 199/2 = 99.5
b = 181/2 = 90.5

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You need to know the following knowledge to solve this word math problem:

algebraUnits of physical quantitiesGrade of the word problem

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