Question
PSLE
At first, Leah had a total of 79 grey and red balloons. 20 red balloons burst. She then increased the number of grey balloons by 70%. After that, Leah had a total of 87 balloons. How many red balloons did she have at first?
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PSLE
At first, Leah had a total of 79 grey and red balloons. 20 red balloons burst. She then increased the number of grey balloons by 70%. After that, Leah had a total of 87 balloons. How many red balloons did she have at first?