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*(2*k+2) = 40 // - 40
5*(2*k+2)-40 = 0
5*(2*k+2)-40 = 0
10*k-30 = 0
10*k-30 = 0
10*k-30 = 0 // + 30
10*k = 30 // : 10
k = 30/10
k = 3
k = 3
| 4(6-7w)=-60 | | 4(7+5x)=88 | | x^4-8x^3+19x^2-32x+60=0 | | 4(-7+2a)=4 | | 3(-7+4x)=-93 | | 5(2+m)=-25 | | 2(-8+4m)=64 | | 3(-7k+5)=-90 | | 2(5-6a)=-122 | | -0.2=-0.8-y | | 6(6-2x)=-108 | | 2(9+3d)=60 | | f(x)=3x^2-x-2 | | 3(4d-7)=-153 | | 12x^2+4x+6=0 | | 3(-3m+3)=-9 | | 5(7+3b)=215 | | 5(-4+2m)=100 | | 6(-7a+8)=174 | | 5(-8+k)=-20 | | 5(2n+1)=115 | | 5(1k+2)=25 | | f(x)=x^2+11x | | 5(-5+7m)=-130 | | 3(-4a+7)=93 | | 6(-4x+8)=-24 | | 7(2k-2)=-140 | | 4(9+2t)=60 | | 4(6x-6)=-120 | | 6(1w+7)=60 | | 7(-8-6t)=-476 | | 3(8-3b)=69 |