Last year is the same as this year plus 3 more books. The total is the two bars added.<br><br>[[model:questions/solutions/q2082.png]]<br><br>• Last year → 38 + 3 = 41<br>• Two years → 38 + 41 = 79<br><br>In the two years she read 79 books.<br>Check: 41 − 38 = 3 fewer this year, and 38 + 41 = 79. ✓