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)
40 = (k^1)/5 // - (k^1)/5
40-((k^1)/5) = 0
40-(k/5) = 0
40-1/5*k = 0 // - 40
-1/5*k = -40 // : -1/5
k = -40/(-1/5)
k = 200
k = 200
| x+6y-28z=3 | | 5u=4u^2-6 | | V+7v= | | y/5=4/100 | | 4y+3=(-17) | | 16-5x=26 | | nx+a= | | 7y^2-3y+8y^2-8y= | | Solve(x)y=3x-11 | | Solvey=3x-11 | | 2x^2sprt(x-2)=0 | | 3xy+6x^2-9y^2=0 | | 430/12-?= | | -5y-11(11t)=42 | | y+c=14 | | 8/3y=-7/15 | | 3a+4=5a-7 | | 5-3y=17 | | 9(x+2)=2x+3 | | x(y^2-z^2)+y(z^2-x^2)+z(x^2-y^2)=0 | | bx+ay=ab | | 3.5+6.2y-3.6y=-6.9 | | 5.2=2.6n-4.8n-3.6 | | 3/8y=-1/6 | | (8/15)x=10 | | (3z-8)(z+5)= | | 8-3x-9x+7= | | 18x^2-24x+6=0 | | 4x^5-4x^3+x=0 | | 64x^7-112x^5+56x^3-7x=0 | | a-23-6a=2 | | cb^2-ca^2+ba^2+bc^2-ab^2+ac^2-abc=0 |