E = (1/4 - 1/5) x (7 + 37/9) E = (1 x 5 / 4 x 5 - 1 x 4 / 5 x 4) x (7 x 9 / 1 x 9 + 37/9) E = (5/20 - 4/20) x (63/9 + 37/9) E = 1/20 x 100/9 E = 100/180 E = 20 x 5 / 20 x 9 E = 5/9
A = - 4/9 : (3/7 - 4/3) + 11/2 A = - 4/9 : (3 x 3 / 7 x 3 - 4 x 7 / 3 x 7) + 11/2 A = - 4/9 : (9/21 - 28/21) + 11/2 A = - 4/9 : - 19/21 + 11/2 A = - 4/9 x - 21/19 + 11/2 A = 84/171 + 11/2 A = 84 x 2 / 171 x 2 + 11 x 171 / 2 x 171 A = 168/342 + 1881/342 A = 2049/342 A = 3 x 683 / 3 x 114 A = 683/114
B = 5/4 + 3/4 x 2/5 2/7 - 2/3 B = 5/4 + 6/20______ 2 x 3 / 7 x 3 - 2 x 7 / 3 x 7 B = 5 x 5 / 4 x 5 + 6/20 6/21 - 14/21 B = 25/20 + 6/20 - 8/21 B = 31/20 x - 21/8 B = - 651/160
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Verified answer
E = ( 5/20 - 4/20) x ( 63/9 + 37/9)E = 1/20 x 100/9
E = 100/180 = 5/9
a = - 4/9 : ( 9/21 - 28/21) + 11/2
a = - 4/9 : ( - 19/21 + 11 /12)
a = - 4/9 : ( - 76/84 + 77/84)
a = - 4/9 : 1/84
a = - 4/9 x 84 = - 336/9 = - 112/3
b = ( (5/4 + 6/20) : ( 6/21 - 14/21)
b = ( 25/20 + 6/20) : ( - 8/21)
b = 31/20 x - 21/8
b = - 651/160
c je ne vois pas la fin
Verified answer
E = (1/4 - 1/5) x (7 + 37/9)E = (1 x 5 / 4 x 5 - 1 x 4 / 5 x 4) x (7 x 9 / 1 x 9 + 37/9)
E = (5/20 - 4/20) x (63/9 + 37/9)
E = 1/20 x 100/9
E = 100/180
E = 20 x 5 / 20 x 9
E = 5/9
A = - 4/9 : (3/7 - 4/3) + 11/2
A = - 4/9 : (3 x 3 / 7 x 3 - 4 x 7 / 3 x 7) + 11/2
A = - 4/9 : (9/21 - 28/21) + 11/2
A = - 4/9 : - 19/21 + 11/2
A = - 4/9 x - 21/19 + 11/2
A = 84/171 + 11/2
A = 84 x 2 / 171 x 2 + 11 x 171 / 2 x 171
A = 168/342 + 1881/342
A = 2049/342
A = 3 x 683 / 3 x 114
A = 683/114
B = 5/4 + 3/4 x 2/5
2/7 - 2/3
B = 5/4 + 6/20______
2 x 3 / 7 x 3 - 2 x 7 / 3 x 7
B = 5 x 5 / 4 x 5 + 6/20
6/21 - 14/21
B = 25/20 + 6/20
- 8/21
B = 31/20 x - 21/8
B = - 651/160