If it's not what You are looking for type in the equation solver your own equation and let us solve it.
z in (-oo:+oo)
z/15 = -30 // + 30
z/15+30 = 0
1/15*z+30 = 0 // - 30
1/15*z = -30 // : 1/15
z = -30/1/15
z = -450
z = -450
| 2r+2r=8 | | (4w+1)(7-w)=0 | | 2x^2+15x-15= | | 11x/4(4-2)=9x+10 | | 2t+7t=36 | | 6(t-3)+6t=4(3t+5)-11 | | 3y^2=7y+6 | | 3xsquared=27 | | (8+v)(4v+6)=0 | | 8x^4-32x^2+55x-27=0 | | -[6x-(2x+8)]=-1[6(2x-3)-6x] | | 4.2q-4.1-4.9=1.7q-2.1 | | -2x=6y+18 | | 3x-17y=29 | | 3x-29=5y | | (1-y)(3y-4)=0 | | (1-y)(3y-4)= | | r+29=21 | | j+1/8=-1/4 | | 12(2x-3)=4(6x+1) | | 4+18r-3=9r+129-7r | | 5-(2x+14)=26-7x | | y/19=-8 | | d^-7q/13g^-6 | | p/p^-4 | | 3x^2=-20x | | (x-5)(x+12)=0 | | (5x+4)(5x-7)=0 | | 5x+8=3x+54 | | 5n+16-7n=30 | | 10t^2=-33t | | (2z-1)(6+z)=0 |