Question 1119680
K is {{{x}}} years old and J is {{{x+3}}} years old. {{{x^2+2(x+3)=69}}}

{{{x^2+2x+6-69=0}}}

{{{x^2+2x-63=0}}}

{{{(x-7)(x+9)=0}}}

{{{highlight(x=7)}}} or {{{x=-9}}} 

{{{7+3=highlight(10)}}} K is 7 and J is 10.