resoudre cette equation 7x-9+2x-9x+22x=3-x+4x-9+18x
Bonsoir
7x -9 +2x -9x +22x = 3 -x +4x -9 +18x
31x -9x -9 = 22x -x -6
31x -9x -22x +x = -6 +9
32x - 31x = 3
x = 3
7x-9+2x-9x+22x=3-x+4x-9+18x
22x -9 = 21x - 6
22x-21x = -6+9
x=3
