1) 3 x 7a = 21 a
2) 8a x (-5) = -40 a
3) -4 x 6a = 24 a
4) -a x (-3) = 3 a
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Verified answer
1) 3 x 7a = 21 a
2) 8a x (-5) = -40 a
3) -4 x 6a = 24 a
4) -a x (-3) = 3 a