<human>:  Bob has a certain number of marbles. If he receives 2 dozen more marbles, he will have 60 marbles. If he loses 10 of the marbles he has, how many marbles will Bob have?
<bot>: Define a variable ** Let B be the number of marbles Bob starts with.
How many marbles are 2 dozen? ** 2 dozen marbles is 2 * 12 = <<2*12=24>>24 marbles.
How many marbles does Bob have after receiving 2 dozen more? ** So after receiving 2 dozen more marbles, we know B + 24 = 60.
How many marbles does Bob have after receiving 2 dozen more? ** This means B = 60 - 24 = <<60-24=36>>36.
How many marbles does Bob have after losing 10? ** Bob ends with 36 - 10 = <<36-10=26>>26 marbles.
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