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)
k/20 = -8 // + 8
k/20+8 = 0
1/20*k+8 = 0 // - 8
1/20*k = -8 // : 1/20
k = -8/1/20
k = -160
k = -160
| -6j+4.91=-4.89-7j | | (7x+8)+(9x-8)=128 | | 10=4/9x-2/3x | | 2x-3+7=2x-3(4+x)+x | | 3x+7+6x-3=85 | | 11r=-8+12r | | 8•x/3=40 | | 2/7x-1/3=2 | | 2x-3+7=2x-3(4+x) | | 8x-61=74-x | | X^2+21x-33=0 | | 12=3x+4x-2 | | -3-11z+1=-14-8z | | 187+72=m | | 6(x+7)=1+5x | | 11x+3+29x+7=90 | | 96(-4+4x)=64(36) | | 12y+18=-16+14y | | 2x+9-3x=9 | | -18p=-20-20p | | -117+12x=155-4x | | 3x-5+5x-6= | | -85=5v | | 3r+5=20 | | a^2+b=0 | | 192=-12r | | -12b+13=-11-15-15b | | -4x-3=5x-13-x | | X-2/3=-16 | | -4-6b=2(2b+2) | | -16x=-160 | | 4x-(x-4)=20 |