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)
4*k+(10/8)*k+2/20+4 = 0
21/4*k+41/10 = 0 // - 41/10
21/4*k = -41/10 // : 21/4
k = -41/10/21/4
k = -82/105
k = -82/105
| 2-(32-34)= | | x/15=8/15x+1/15 | | -8-6k=-5k | | 10x=x+243 | | (2/x-3)+(3/4)=(17/2x) | | (-3-12)-(-40)= | | 11u+20=-20+16u-20 | | X/3+5/7=2x/21 | | x/7-5=4 | | 12(2*x-3)=6*w | | 12b=b+27 | | a^2-5=0 | | -3x-2-2-5x=10 | | -5-5-5-5= | | (-8)(-8)(5)(5)(-8)= | | 3x-28+2+12=180 | | 7+5w=6w | | 5/3w+5/2=7/2w+1/6 | | w-8+2=26+8 | | -4y+8x=-16 | | 13=3x-5 | | -8y=10-7y | | -16+9-2+6= | | 3(4+y)=4y | | 1/6p=5+2/3q | | v+12=-6 | | -5u+6=61 | | x^2(x^2-49)-(x^2-49)=0 | | 42=-2-2x+28 | | 6+10h=8h+8 | | 2/15=6/4w+5 | | x/10=x/11-11 |