Question 1196617
Mother is A years older than her son.  Mother's age is K years more than T times her son's age.  
How old are they?


Mother, x+A
Son,  x


{{{x+A=K+Tx}}}
-
{{{x-Tx=K-A}}}
{{{x(1-T)=K-A}}}

{{{x=(K-A)/(1-T)}}}

{{{x=((-1)/(-1))((K-A)/(1-T))}}}


{{{highlight_green(x=(A-K)/(T-1))}}}-----------this one will work no matter what the given values.



Your example:
A=15
K=5
T=2
x, the son's age
X+A, mother's age












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Son is 10
Mother is 25