Sagot :
bonjour
A = 2 (3-X) - (x - 1) = 6 - 2 x - x + 1 = - 3 x + 7
B = 5(2-3x) + 4 (x + 3) = 10 - 15 x+ 4 x+ 12 = - 11 x + 22
C = -x + 2 (3-4.x)-3(31-1) = - x + 6 - 8 x - 93 + 3 = - 9 x - 84
Bonjour
Développer et réduire
A = 2 (3-X) - (x - 1)
A = 6x - 2x - x + 1
A= 3x + 1
B = 5(2-3x) + 4 (x + 3)
B = 10 - 15x + 4x + 12
B = - 15x + 4x + 10 + 12
B = - 11x + 22
C = -x + 2 (3-4.x)-3(31-1)
C = - x + 6 - 8x - 93 + 3
C = - x - 8x + 6 + 3 - 93
C = - 9x - 84.