Anniversary 20843

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

Correct 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

Our linear equations calculator calculates it.



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