bonsoir
a = 7/5 x 3/4 = 21/20
b = 5/9 x 7/5 = 7/9
c = 3x7/4 = 21/4
d = 9/42 x 14/27 = 9 /14x3 x 14/9x3 = 1/3 x1/3 = 1/9
e = 5/9 +7/3 x4 = 5/9 +28/3= 5/9 +84/9 = 89/9
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bonsoir
a = 7/5 x 3/4 = 21/20
b = 5/9 x 7/5 = 7/9
c = 3x7/4 = 21/4
d = 9/42 x 14/27 = 9 /14x3 x 14/9x3 = 1/3 x1/3 = 1/9
e = 5/9 +7/3 x4 = 5/9 +28/3= 5/9 +84/9 = 89/9
B=35/45=7/9
C=21/4
D=(3/14) x (14/27) = 42/378 = 1/9
E=(5/9)+(28/3) = (5/9)+(84/9) = 89/9