If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a-12=-54
We move all terms to the left:
a-12-(-54)=0
We add all the numbers together, and all the variables
a+42=0
We move all terms containing a to the left, all other terms to the right
a=-42
| 14=x/4+13 | | 45=0+0.5(10)(t′)2 | | y/4+7=120 | | 5.3=10/x | | 22x+15=191 | | 22x+15= | | 3x+7=11x-33 | | 4x-8=12x+12 | | 6=1-2n+11 | | -6(x+5)-5=-71 | | 7r+9=57-r | | 3k+17=20k-51 | | 6x+11=-6x-13 | | 0.5d−3d+5=0 | | 6x+9=15x+-3 | | -5/6(12c-6)=-75 | | x/2=15.5 | | b-3/3=4 | | 7x-19=16x | | 130=7x-6 | | 1x31=10 | | 8=u+46/8 | | 2(k-31)=46 | | 23/20x=3 | | 12+1/9b=20 | | 1,10^x=100 | | 9=r+21/8 | | -7j-14-+9=-12 | | 1.10^x=100 | | -2=w-5/4 | | x*A=x*B+C | | 3(x-2)-12=2(x+1) |