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)-20 = 10 // - 10
-((2/5)*k)-20-10 = 0
(-2/5)*k-20-10 = 0
-2/5*k-30 = 0 // + 30
-2/5*k = 30 // : -2/5
k = 30/(-2/5)
k = -75
k = -75
| 3/4d-5=-11 | | X-6/11=2/9 | | 1.68/w=7/12 | | 8y=4y+32 | | 17=m+5 | | 4x^4-10x^2+3=0 | | -xminus-y=.6 | | 4p-12=4p-21 | | d=2m-5n | | 8v^2-2v=19 | | 3p^2-8=-49 | | X/4=12/20 | | 4bsquared+8b=0 | | 35b^2-48b+16=0 | | x-y=.6 | | -6+8h=42 | | 21x^4-4=0 | | 3x-5(6y-2x)+5y= | | 8p-24=8+8p | | 9x+1=10x-10 | | 3.5*x=150000 | | 350=(x+20) | | 3=11-x | | 9x+1=1x-10 | | -z/30 | | 16=m-2 | | 8p-32=8+8p | | 116+b=180 | | 3+2w=-11 | | 6n^2-7n=-4 | | 4x+30=9x-5 | | y=85/x |