If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-30+z=12
We move all terms to the left:
-30+z-(12)=0
We add all the numbers together, and all the variables
z-42=0
We move all terms containing z to the left, all other terms to the right
z=42
| -104x=8 | | 14=-56b | | -9-2(-8x-2)=-12 | | x/3+19=23 | | -15=n-2 | | 2/3n-8=1/2n-3 | | x+(x+30)+2x=180 | | 3(n-7)=-63 | | 2/3n-8=1/2-3 | | 2/3n+8=1/2+3 | | 3x+17+5x=7x+10 | | 1/2y-×=-1 | | 15-x÷4=25 | | 15x-10=9×+2 | | ((0.05)(66-x))+0.06x=0.4 | | U10=7+5n-5 | | 31/2x-11=360 | | |2b-9|=2b-6 | | k-2/2=-11 | | 8x+14=4x+2 | | P(x)=-48 | | 0.05(66-x)+0.06x=0.4 | | 12x-18+8=7x | | 12+m=-9 | | 8-y=4y= | | -114=-19r | | 24+2f-3=11*3 | | 34(20y−8)+5=12y+14(20y+8) | | x2+1/3+2=x2 | | -4n=-72 | | -15=h-6 | | 15+6•t=81 |