A = (12/15 + 18/24) - [(11/14 - 2/7) × 35/20
= (4/5 + 6/8) - [(11/14 - 4/14) × 35/20
= (32/40 + 30/40) - 7/14 × 35/20
= 62/40 - 1/2 × 35/20
= 62/40 - 35/40
= 27/40
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Verified answer
A = (12/15 + 18/24) - [(11/14 - 2/7) × 35/20
= (4/5 + 6/8) - [(11/14 - 4/14) × 35/20
= (32/40 + 30/40) - 7/14 × 35/20
= 62/40 - 1/2 × 35/20
= 62/40 - 35/40
= 27/40