Bonjour
3 + 5/4 x (2 - 1/5)
= 3 + 5/4 x [(2 x 5) / (1 x 5) - 1/5]
= 3 + 5/4 x (10/5 - 1/5)
= 3 + 5/4 x 9/5
= 3 + 45/20
= (3 x 4) / (1 x 4) + (5 x 9) / (5 x 4)
= 12/4 + 9/4
= 21/4
