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)
1 = k+8/15 // - k+8/15
1-k-(8/15) = 0
1-k-8/15 = 0
7/15-k = 0 // - 7/15
-k = -7/15 // * -1
k = 7/15
k = 7/15
| 6/7*9/16 | | -7k-k=-10k | | -116=-7x+2(-7x+5) | | 4.8/3 | | -7k-k=10k | | x(6x-6)=(6+8)(x-7) | | 15+3x+1=7x+1 | | 6(-2)-3(-5)/4-2 | | 3x^3+2x^2y+3xy^2+2y^3= | | 2a-5b/6a-4a+5b/4a+2 | | 3x^3+2x^2v+3xy^2+2y^3= | | 3x-4=6x+5 | | -7/8m=-2/3 | | 5.25x=15 | | 10n^2-5n-10=-6 | | 2/3x-5=x/4 | | 6^2-36/3^2*8-2 | | -15x+7x-1=3-8x | | 5.25+x=15 | | -x/-6=-2 | | 2y+(x+9)=98 | | 3/y+9/y=4 | | x+3/3+x+1/4 | | -4y^2-24y-30-x=0 | | 8+12a=4a+9a | | -8y+9=-3-7y | | 0.7t=0.7+0.6t | | 5b+12b=13+4b | | (3/4)x=-9/16 | | 8n+7=-25 | | 21+2n=6n-3 | | -10+2r=10r-12-6r |