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Shaira is 3 years older than Maryl. 4 years ago, the sum of their ages was 12.

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Solution

Shairais3yearsolderthanMaryl.4yearsago,thesumoftheirageswas12.

Solution

Shaira′sageis:1121​
Maryl′sageis:821​
Solution steps
Translate the problem into an equation:x−4+x−3−4=12
Solve for x,x−4+x−3−4=12:x=223​
Find age
Shaira′sageis:1121​
Maryl′sageis:821​

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