Respuesta :

Age (A) = n = 59

Age (B) = n+1 = 60

Age (C) = n+2 = 61

*The oldest is Age (C).

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n+(n+1)+(n+2)=180

n+n+1+n+2=180

3n+3=180

3(n+1)=180

n+1=60

n=59

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The answer is: 61 years old.
bobeld
n= youngest
n+1= middle friend (by age)
n+2 = oldest

n + n + 1 + n + 2 = 180  (the sum of their ages = 180)

Combine like terms
3n + 3 = 180

Now subtract 3 from each side of the equation

3n + 3 - 3 = 180 -3
3n = 177

Now divide both sides of the equation by 3
n= 59      n + 1 = 60  and n + 2=61  Ages are 59, 60, 61

Another way 180 ÷ 3 = 60.    So 60 + 60 + 60 =180   Take one from one of the 60s and add it to one of the others and you will also get 59,60 and 61. 

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