Question
PSLE
Irene had two strings of the same length. She cut the first string into equal parts of length 70 cm and to each part she tied 2 brown flags. After that, she cut the second string into equal parts of length 90 cm and to each part she tied 3 black flags. When she finished tying, she counted that there were 9 more black flags than brown flags. How many flags were there altogether?
5 m

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PSLE
Irene had two strings of the same length. She cut the first string into equal parts of length 70 cm and to each part she tied 2 brown flags. After that, she cut the second string into equal parts of length 90 cm and to each part she tied 3 black flags. When she finished tying, she counted that there were 9 more black flags than brown flags. How many flags were there altogether?