7. Cathy has 1250 more stamps than John. After John gave Cathy 68 stamps, she had four times as many stamps as John. How many stamps did John have at first?
[ ][ ][ ][ ]
C [ ][ 1250 ][68]
J [ ][68] ?
3 u -- > 68 + 1250 + 68 = 1386
1 u -- > 1386 ÷ 3 = 462
462 + 68 = 530 stamps
John had 530 stamps at first.
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