3/2 x - 5/9 = 0
3/2 x = 5/9
x = 5/9 ×2/3
x =10/27
-3/4 x -6 = 3/2 x
-3/4 x - 3/2 x = 6
-3/4 x - 6/4 x = 6
-9/4 x = 6
x = 6 × -4/9
x = -8/3
1/3 x - 3/2 = 2 x + 1/3
1/3 x - 2 x = 1/3 + 3/2
-5/3 x = 11/6
x = 11/6 × -3/5
x = -11/10
x - 6 = 3/2 x
x - 3/2 x = 6
-1/2 x = 6
x = 6 × -2
x = -12
(3x+1)(2x+1) - (3x+1)² = 0
(3x+1)[ (2x+1)-(3x+1)] = 0
(3x+1) (-x) = 0
-3x² -x = 0
x(-3x -1) = 0
x=0 ou x = -1/3
(2x-1)² = (3x+2)(3x+2)
(2x-1)² = (3x+2)²
2x-1 = 3x+2
-x = 3
x = -3
(3-x)(2x+1) = 0
3-x = 0 ou 2x+1 = 0
x=3 ou x = -1/2
(5x - 3 )² = 64
(5x-3)² = 8²
5x-3 = 8
5x = 8+3
x = 11/5
(2x-1)² + 16 = 0
impossible car un carré est toujours positif.
3x - 1/ 2-x = 0
un dénominateur ne peut pas être nul donc 3x-1 = 0, x = 1/3
x-3/x+4 = 3/5
(x-3) × 5 = (x+4) × 3
5x - 15 = 3x + 12
5x - 3x = 12 + 15
2x = 27
x= 27/2
