Sagot :
A = 8x + 48
B = 12 - 4x
C = -2x - 10
D = -3x + 21
5x + 2x = 13
7x = 13
9x - 3x = 16 - 8
6x = 8
B = 12 - 4x
C = -2x - 10
D = -3x + 21
5x + 2x = 13
7x = 13
9x - 3x = 16 - 8
6x = 8
Réponse:
exercice 1
1) A= 8x + 8×6 = 8x + 48
B= 4×3 - 4x = 12 - 4x
C= -2x + (-2)×5 = -2x + (-10) = -2x - 10
D= -3x - (-3)×7 = -3x - (-21) = -3x + 21
2) 5x = 13 - 2x
5x + 2x = 13 - 2x + 2x
7x = 13
7x ÷ 7 = 13 ÷ 7
x = 13 ÷ 7
9x - 8 = 3x + 16
9x - 8 - 3x = 3x + 16 - 3x
6x - 8 = 16
6x - 8 + 8 = 16 + 8
6x = 24
6x ÷ 6 = 24 ÷ 6
x = 4