Mr and Mrs

Mr. Calda and Mrs. Cald have a total of 139 years. How many years have when we known that Mr. Calda is nine years older than Mrs. Cald?

Final Answer:

a =  74
b =  65

Step-by-step explanation:


a+b = 139
a = 9 + b

a+b = 139
a-b = 9

Row 2 - Row 1 → Row 2
a+b = 139
-2b = -130


b = -130/-2 = 65
a = 139-b = 139-65 = 74

a = 74
b = 65

Our linear equations calculator calculates it.



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