If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-12=-4e
We move all terms to the left:
-12-(-4e)=0
We get rid of parentheses
4e-12=0
We move all terms containing e to the left, all other terms to the right
4e=12
e=12/4
e=3
| 4x-7=50+3 | | c/4+14=17 | | w-7/20=9/20 | | 3c=2c+6 | | (5x+10)+(3x)=180 | | 2/3 a−26=−5 | | 3.6s+9=8.1s | | 2.8+10m=6.53 | | r/2-12=-8 | | 0.5x+x+30+4x+50=190 | | -2x-(x+2)=-6-x | | 23 a−26=−5 | | –2r=–7−r | | 5-c/6=8 | | E(x)=45+10x | | 6x-16+58=2x+4 | | (5x-2)=(x+70) | | 1.8=3.9-0.7x | | 3x+2+3x=38 | | 20+20+3v=-15v-14 | | t/4-3=-2 | | x^2-3x-51=19 | | 19+.10x=60 | | (x+8)(x=11)=0 | | –6f=8−5f | | 6-4x+12=2x | | 7m-0.7=-0.77 | | ((n-2)*180)/n=5*(360/n) | | 3/x-2=9/8-4 | | 2x+4+58=6x-16 | | 3x-10+4x+9=90 | | 1/3x+3=8-1/6x |