Question
PSLE
At first, Leah had a total of 58 pink and black balloons. 17 black balloons burst. She then increased the number of pink balloons by 70%. After that, Leah had a total of 55 balloons. How many black balloons did she have at first?
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PSLE
At first, Leah had a total of 58 pink and black balloons. 17 black balloons burst. She then increased the number of pink balloons by 70%. After that, Leah had a total of 55 balloons. How many black balloons did she have at first?