Elmo and Farah had 153 crystal plates altogether. 1/3 of Elmo's crystal plates is 15 more than 1/6 of Farah's crystal plates. How many crystal plates did Elmo have?
Excess = 15 × 3 = 45 3u + 6u = 9u 9u = 153 - 45 = 108 1u = 108÷ 9 = 12 Elmo = 3u + 45 = 3 × 12 + 45 = 81 plates
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