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)
(-2/5)*k-(1/2) > 4/5 // - 4/5
(-2/5)*k-(1/2)-(4/5) > 0
(-2/5)*k-1/2-4/5 > 0
-2/5*k-13/10 > 0 // + 13/10
-2/5*k > 13/10 // : -2/5
k < 13/10/(-2/5)
k < -13/4
k in (-oo:-13/4)
(-oo:-13/4)
| 4y+4=24whatisy | | 10r^2+29r-21=0 | | 0=r^2-20997.4613 | | 6x+4x+60=180 | | o=r^2-20997.4613 | | 7y=40 | | 7x^2=11x-24 | | 10x=10+2x-8 | | 2x-13x+15=0 | | N=m-6/4 | | x+(x+1)=321 | | 1/у-5/6у | | 2x-5=75/5 | | 10x=102x-8 | | 558+n=945 | | n-2=44 | | 4-4x+2=4-2x+6 | | 11y-7=6y+28 | | =257 | | 3y-9/12 | | x-2/15=5/15 | | n*76=4 | | (18m-12)=cos(7m+2) | | 7x-2=-3x+5(2x-1) | | 3x+2=x+2x+4 | | 1/6x=5/6 | | 3-3x^2+7x=5 | | 27x-11=127-19x | | X+8=y-3 | | -8.3x+29=5.1x+13 | | n*56=4 | | 80t^3-120t^2+45t= |