find the reciprocal of -2/3×5/7+2/9÷1/3×6/7
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(-2/3 × 5/7) + (2/9 ÷ 1/3) × 6/7
= (-10/21) + (2/9 x 3/1) x 6/7
= (-10/21) +[(6/9) x 6/7]
= (-10/21) + (2/3 x 6/7)
= (-10/21) + (12/21)
= (-10 + 12 /21)
= 2/21
Reciprocal of 2/21 is 21/2
= (-10/21) + (2/9 x 3/1) x 6/7
= (-10/21) +[(6/9) x 6/7]
= (-10/21) + (2/3 x 6/7)
= (-10/21) + (12/21)
= (-10 + 12 /21)
= 2/21
Reciprocal of 2/21 is 21/2
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