Bonjour,
6a + 5 = 2a + 3
6a - 2a = 3 - 5
4a = -2
a = -2/4
a = -0,5
8b + 7 = 6b + 11
8b - 6b = 11 - 7
2b = 4
b = 4/2
b = 2
-4d + 1 = d + 2
-4d - d = 2 - 1
-5d = 1
5d = -1
d = -1/5
d = -0,2
a) 6a+ 5 = 2a + 3
a = -1/2 = -0.5
b) 8b+7=6b+ 11
c) -4d+1= d+2
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Bonjour,
6a + 5 = 2a + 3
6a - 2a = 3 - 5
4a = -2
a = -2/4
a = -0,5
8b + 7 = 6b + 11
8b - 6b = 11 - 7
2b = 4
b = 4/2
b = 2
-4d + 1 = d + 2
-4d - d = 2 - 1
-5d = 1
5d = -1
d = -1/5
d = -0,2
a) 6a+ 5 = 2a + 3
6a - 2a = 3 - 5
4a = -2
a = -2/4
a = -1/2 = -0.5
b) 8b+7=6b+ 11
8b - 6b = 11 - 7
2b = 4
b = 2
c) -4d+1= d+2
-4d - d = 2 - 1
-5d = 1
d = -1/5