Roses = 6 &times; Orchids. The model shows roses as 6 units and orchids as 1 unit.<br><br>&bull; 6 units &rarr; 180 roses<br>&bull; 1 unit (orchids) &rarr; 180 &divide; 6 = 30<br>&bull; Difference = 180 &minus; 30 = 150<br><br>She has 150 more roses than orchids.<br>Check: 6 &times; 30 = 180 roses. &#10003;