(6 by 7 into minus 1 by 10) into minus 15 by 8 is equal to 6 by 7 into (minus 7 by 10 into minus 15 by 8 +)
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Step-by-step explanation:
(6×7×-1/10)×-15/8=6/7×(-7/10×-15/8)
-21/5×-15/8=6/7×-21/16
63/8=9/8
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