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)
(-3/10)*k = 3/10 // - 3/10
(-3/10)*k-(3/10) = 0
(-3/10)*k-3/10 = 0
-3/10*k-3/10 = 0 // + 3/10
-3/10*k = 3/10 // : -3/10
k = 3/10/(-3/10)
k = -1
k = -1
| 6-5(2n+3)=4(2-5n) | | 2t/2 | | 6-5(2x-3)= | | 1091+3b=-20 | | 2t/t | | 5x-3=2x+7-x | | 0=4x^3-16x | | x-3=2x+7-x | | 5n/3=10 | | 3c+6=-24 | | 8i/2i | | x-8x+8=4-4x | | 3k+5=20 | | -1/4(-3/2)(5/7) | | -0.10(29)+0.30x=0.05(x-8) | | 18-x/2=1 | | 0.16y+0.09(y+9000)=3060 | | 0=1(3x+1)(x-1) | | 2(6z-1)-5(z+9)=2(z+1) | | 0.15y+0.04(y+7000)=1230 | | 7.8x-1.1=22.3 | | H=5+33t-16t^2 | | 7.8x-1.1=14.5 | | Y=x^2+9+14 | | 2x^2+6x-9=9-3x | | 3x+21y=18 | | 3x^2+6x-6=19-4x | | 4(6z-1)-2(z+1)=19(z+1) | | 8y=20y^2 | | 6+7(x-1)=11-9(x-4) | | 11y=y^3 | | n^2+3n-88= |