6x+2=4x+9
6x-4x = 9-2
2x = 7
x = 7/2
3x-11-6x-10=7+8x-12-7
-3x - 21 = 8x - 12
-3x - 8x = -12 + 21
-11x = 9
x = -9/11
4(2x-1)-7(4x+2)=-6(x-1)+4
8x - 4 - 28x - 14 = -6x + 6 + 4
tu continues - voir au-dessu
(2x-3)(2x+1)=4x²-x+7
4x² + 2x - 6x - 3 = 4x² - x + 7
-4x - 3 = -x + 7
et tu continues
-9x+7=5x-2
tu as compris
6(2x-1)-3(7x-5)=0
12x - 6 - 21x + 15 = 0
-9x = - 9
x = 1
-(4-9x)+2x=5(3+2x)
-4 + 9x + 2x = 15 + 2x
et tu continues
(2x-3)(2x+3)=(2x-5)^2
4x² + 6x - 6x + 9 = 4x² - 20x + 25
9 = - 20x + 25
tu finis
