Question
PSLE
At first, Leah had a total of 50 black and white balloons. 13 white balloons burst. She then increased the number of black balloons by 70%. After that, Leah had a total of 51 balloons. How many white balloons did she have at first?
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PSLE
At first, Leah had a total of 50 black and white balloons. 13 white balloons burst. She then increased the number of black balloons by 70%. After that, Leah had a total of 51 balloons. How many white balloons did she have at first?