If it's not what You are looking for type in the equation solver your own equation and let us solve it.
20+c=100
We move all terms to the left:
20+c-(100)=0
We add all the numbers together, and all the variables
c-80=0
We move all terms containing c to the left, all other terms to the right
c=80
| 34x180=6120 | | j+-2=-13 | | h/5=105 | | 3*(2x+10)=54 | | -6x+8=2(x+16) | | 115=7x+3 | | 36-x=2x+15 | | d+-1=-13 | | 0.25*x=2.50 | | 6+3^2x=10 | | 152+78/2=7x+3 | | 2.50÷0.25=x | | -36x=2x+15 | | 10z+3z-10z=18 | | 3x+5=2/(10x+2) | | (299.99-x)/x=0.18 | | 39x+117=0 | | (6x+13)=(9x-14) | | 24=3.m | | -5t^2+10=t+40 | | 25x-6=6.5 | | 14h+2h-15h=13 | | 21-1/2y=15 | | 40+56=96x(A+B) | | (j+4)/6=18/12 | | 4.50*x=13.50 | | 21y-15=21 | | 9(v+1)=9 | | 2x+3=10x-19 | | 2x+67=-8x+87 | | s-3=19* | | 37=10b+12 |