Question
59 of a packet of balls were purple. 34 of the remaining balls were silver and the rest were black. If there were 20 more silver balls than black balls, how many balls were there in the packet altogether?
4 m

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59 of a packet of balls were purple. 34 of the remaining balls were silver and the rest were black. If there were 20 more silver balls than black balls, how many balls were there in the packet altogether?