Question
There were four times as many boys as girls in a gathering. After 11 boys had left the party and another 25 girls had joined the party, there was an equal number of boys and girls in the end. Find the number of boys at first.
4 m

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There were four times as many boys as girls in a gathering. After 11 boys had left the party and another 25 girls had joined the party, there was an equal number of boys and girls in the end. Find the number of boys at first.