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bonjour

6 a + 5 = a + 15

6 a - a = 15 - 5

5 a = 10

a = 10/5 = 2

2 x - 3 = - x + 2

2 x + x = 2 + 3

3 x =  5

x =  5/3

3 b + 3 = 12

3 b = 12 - 3

3 b = 9

b = 9 /3 = 3

Bonjour,

6a + 5 = a + 15

6a - a = 15 - 5

5a = 10

a = 10/5 = 2

2x - 3 = -x + 2

2x + x = 2 + 3

3x = 5

x = 5/3

3(b + 1) = 12

3 * b + 3 * 1 = 12

3b + 3 = 12

3b = 12 - 3

3b = 9

b = 9/3 = 3.

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