Question 1177596


let Cayla's age be {{{C}}} and Jose's age {{{J}}}

if three times Cayla's age plus Jose's age equal {{{60}}}, we have

{{{3C+J=60}}}.......eq.1

if Cayla's age is three times Jose's age, we have

{{{C=3J}}}.........eq.2, substitute in eq.1


{{{3*3J+J=60}}}.......eq.1

{{{9J+J=60}}}

{{{10J=60}}}

{{{J=6}}}

go to

{{{C=3J}}}.........eq.2, substitute {{{J}}}

{{{C=3*6}}}

{{{C=18}}}

 Cayla is {{{18}}} years old