At first, Mrs. Linda and Mdm. Goh has the same number of pupils in each of their CCAs.<br>After 27 pupils joined Mrs. Linda's CCA and 3 pupils joined Mdm. Goh's CCA, the number of pupils in Mrs. Linda's CCA became 4 times as many as the number of pupils in Mdm. Goh's CCA.<hr>There were <input min="0" type="number" id ="imp5pg014q13_1" class="lineinput" placeholder="?" /> pupils in Mrs. Linda's CCA in the end.