Question 176350
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Let {{{x}}}=Rose Age
Then, {{{x+4}}}=Cora's Age
As per condition:
{{{R+C=40}}}
{{{x+x+4=40}}}
{{{2x=40-4=36}}}
{{{cross(2)x/cross(2)=cross(36)18/cross(2)}}}
{{{x=18yrs}}} Age of Rose
{{{18+4=highlight(22)}}} Cora's Age
Check:
{{{18+22=40}}}
{{{40=40}}}
Thank you,
Jojo</pre>