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)
(-5*k)/3 = 15/3 // - 15/3
(-5*k)/3-(15/3) = 0
(-5*k)/3-5 = 0
-5/3*k-5 = 0 // + 5
-5/3*k = 5 // : -5/3
k = 5/(-5/3)
k = -3
k = -3
| x^4-10x^3+294x^2-1690x+21125=0 | | -2m=24 | | 3y-5=-50 | | 3y-5=50 | | x/3-4=8 | | x^2-3-1=0 | | 16x^2+5y^2+27x-36y=-45 | | 2y-5=11 | | 2x+5=15-2x | | x+25=x | | 11x=21+4x | | 4a-2+2a=10 | | x+45x+40=x+25 | | -16t^2+192t=0 | | 4c/3=20 | | 90-7x=20x-15 | | 7x^2-8=76 | | -3(x+5)=6 | | x^2+2-3x=0 | | -16t^2+192t-560=0 | | 7x+3-5x=-5 | | -26x=3 | | 5/11=2x/7 | | 3/8=4x+5 | | 3/8=4x | | 10/13=x/17 | | x*(4-3x)(2x-5)=0 | | x^2-30-7x=0 | | -16+9x=-4+7x | | 6(c-1)c=4 | | -2x-2=3x-10 | | 2x^2+26=x^2+1 |