bonsoir
I = 6 x + 3 - 4 x + 2 = 2 x + 5
j = - 6 - 2 x - 7 x = - 9 x - 6
K = 3 - 7 x + 2 - 5 x + 2 = - 12 x + 7
L = 6 + 2 x + 3 - 5 x + 1 = - 3 x + 10
Explications étape par étape:
I = 6x + 3 - (4x - 2)
= 6x + 3 - 4x + 2
= 6x - 4x + 3 + 2
= 2x + 5
j = - ( 6 + 2x ) - 7x
= - 6 - 2x - 7x
= - 2x - 7x - 6
= - 9 - 6
= - 15
K = 3 - ( 7x - 2 ) - ( 5x - 2 )
= 3 - 7x + 2 - 5x + 2
= 3 + 2 + 2 - 7x - 5x
= 7 - 12x
L = 6 - ( - 2x - 3 ) - ( 5x - 1 )
= 6 + 2x + 3 - 5x + 1
= 6 + 3 + 1 + 2x - 5x
= 10 - 3x
