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Solve the following:
(a) 3 − 2/3
(b) 4 + 2/5
= 3/1 − 2/3
= (3 × 3 − 2 × 1)/3
= (9 − 2)/3 = 7/3
= 2 1/3
= 4/1 + 2/5
= (4 × 5 + 2 × 1)/5
= (20 + 2)/5 = 22/5
= 4 2/5