Question
PSLE
At first, Leah had a total of 109 purple and gold balloons. 20 gold balloons burst. She then increased the number of purple balloons by 70%. After that, Leah had a total of 138 balloons. How many gold balloons did she have at first?
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PSLE
At first, Leah had a total of 109 purple and gold balloons. 20 gold balloons burst. She then increased the number of purple balloons by 70%. After that, Leah had a total of 138 balloons. How many gold balloons did she have at first?