Question
Some adults board a school bus.
At Bus Stop A, 35 of them alight
and 4 adults board.
At Bus Stop B, 15 of the adults alight
and 10 board.
If there are 18 adults on the bus now,
how many adults are on the bus at first?
3 m

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Some adults board a school bus.
At Bus Stop A, 35 of them alight
and 4 adults board.
At Bus Stop B, 15 of the adults alight
and 10 board.
If there are 18 adults on the bus now,
how many adults are on the bus at first?