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EXERCICE 4899

A) 4x + 3 = 11
4x + 3 - 3 = 11 - 3
4x = 8
4x / 4 = 8 / 4
x = 2

B) 5x + 12 = 37
5x = 25
x = 5

C) 6x + 2 = 50
6x = 48
x = 8

D) 3x + 8 = 50
3x = 42
x = 14

EXERCICE 4898

A) 3x + 7 = 22
3x = 15
x = 5

B) 2x + 3 = 5
2x = 2
x = 1

C) 7x + 12 = 26
7x = 14
x = 2

D) 7x + 1 = 57
7x = 56
x = 8

EXERCICE 375

A) 4x + 3 = 3x + 5
4x + 3 - 3 - 3x = 3x - 3x + 5 - 3
x = 2

B) 5x + 1 = 2x + 10
3x = 9
x = 3

C) 8x + 2 = 4x + 14
4x = 12
x = 3

D) 3x + 2 = x + 6
2x = 4
x = 2

EXERCICE 329

A) 3x + 2 = x + 8
2x = 6
x = 3

B) 8x + 1 = 5x + 4
3x = 3
x = 1

C) 3x + 7 = x + 13
2x = 6
x = 3

D) 8x + 2 = 2x + 20
6x = 18
x = 3