If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
(2*k)/(-7) > 3 // - 3
(2*k)/(-7)-3 > 0
-2/7*k-3 > 0 // + 3
-2/7*k > 3 // : -2/7
k < 3/(-2/7)
k < -21/2
k in (-oo:-21/2)
(-oo:-21/2)
| 12s^2+13s-35= | | W-6.44=9.4 | | a+15=3a-7 | | 12y+7-5y=14 | | U-3.9=6.29 | | 7w-6w-w+2w=6 | | 2x-3=4-6x | | U+3.46=9.63 | | 1/4(9x)=42 | | x+25=13+3x | | 9x-15=2x-2 | | -6(8x+11)=6(-4x-13) | | b^2+3b+6=0 | | Y+21=y-5 | | 3+4x=4x+3 | | 10-2o=2 | | 2x+7+5x= | | H(x)=2x^2-5 | | 2x-7=5x-61 | | 6/22=16/x | | 9r^2-30r+25= | | 5x-y+7-4x+13y-1= | | x=x+65 | | .6(.15-.2x)=.6(.3x+.9) | | 1+20x=4(5x+2) | | 8-2[2/3] | | 1/2(25-50) | | X+28=x+65 | | 21-8x-12y+6+2y-3y= | | y^2dx+(x^2+xy+y^2)dy=0 | | 9x+4=9x+25-7a | | -54=-6(-5x+2)+4(x-2) |