x² - 5x +6 =0
No tiene solución
x=2
4 ( x - 10 ) = -6 ( 2 - x) - 6x
3/4 ( 2x + 4 ) = x+ 19
x² - 4x +7 =0
x = 32
x = 1
-x² + 7x -10 =0
x = 7
2x² - 7x +3 =0
x = 4
x =3 y x=1/2
x² + x +1 =0
x² - 4x +4 =0
2 (x +1) - 3 (x - 2) =x +6
x =3 y x=2
( x-1 ) / 6 - ( x-3 ) / 2 = -1
x =5 y x=2
2 ( 2x - 3) = 6 +x
( x-1 ) /4 - ( x -5 ) /35 = (x+5) /9
x =6
