Bonjour;
b)
3+1 = 14a +2a
4= 16a
a = 4/16
a=0,25
d)
-6+11 = 9a -7a
5 = 2a
a = 5/2
a =2,5
-3b+7b = 11-4
4b = 7
b = 7/4 =1,75
13+5 = 15b +9b
18 = 24b
b = 18/24 = 9/12 = 3/40,75
Explications étape par étape:
b. 3 + 1 = 14a + 2a
4 = 16a
a = 4/16 = 1/4 = 0,26
d. -6 + 11 = 9a - 7a
a = 5/2= 2,5
b. -3b + 7b = 11- 4
b = 7/4
d. 13 + 5 = 15b + 9b
b = 18/24 = 3/4
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Bonjour;
b)
3+1 = 14a +2a
4= 16a
a = 4/16
a=0,25
d)
-6+11 = 9a -7a
5 = 2a
a = 5/2
a =2,5
b)
-3b+7b = 11-4
4b = 7
b = 7/4 =1,75
d)
13+5 = 15b +9b
18 = 24b
b = 18/24 = 9/12 = 3/40,75
Explications étape par étape:
b. 3 + 1 = 14a + 2a
4 = 16a
a = 4/16 = 1/4 = 0,26
d. -6 + 11 = 9a - 7a
5 = 2a
a = 5/2= 2,5
b. -3b + 7b = 11- 4
4b = 7
b = 7/4
d. 13 + 5 = 15b + 9b
18 = 24b
b = 18/24 = 3/4