Bonsoir,
A= 5 ÷ -51 x -34 ÷ 15
A = 5/51 x - 34/15
A = - 170/765
A = (85 x - 2) / (85 x 9)
A = - 2/9
B= 5 ÷ 21 X -21 ÷ -55 X 11 ÷ -21
B = 5/21 x - 21/- 55 x 11/ - 21
B = 105/1 155 x - 11/21
B = - 1 155/24 255
B = (1 155 x - 1) / (1 155 x 21)
B = - 1/21.
