7n-4n=3n Examples: 7 apples - 4 apples = 3 apples, or If n=2, then (7 x 2) - (4 x 2) = (3 x 2), so 14 - 8 = 6 If n=8, then (7 x 8) - (4 x 8) = (3 x 8), so 56 - 32 = 24
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