If it's not what You are looking for type in the equation solver your own equation and let us solve it.
900-c=80
We move all terms to the left:
900-c-(80)=0
We add all the numbers together, and all the variables
-1c+820=0
We move all terms containing c to the left, all other terms to the right
-c=-820
c=-820/-1
c=+820
| 900=c | | 2(3x-4)+2=2x-5 | | 2x-5x=12x-15 | | 4+3=3-5p | | 2(3x+4)=6(x-1) | | 5x+62+180-3x+47=180 | | 10=4/5(7x+15) | | 3x+3+3x+18=9x-6 | | 3x+18+2x-7=10x-14 | | 8x+11=180-73 | | y=4(x+4)(x-3) | | 5(3x+2=40 | | 3x+18=11x-18+3x+14 | | 11x-18=3x+18+3x+14 | | 0.6=x/0.15 | | 379.2=m150 | | 33+r=50 | | 53x=215 | | 72/4x+11=4 | | x/8-1=(-6) | | 13=s+17 | | f(33)=2x+3 | | -6x+3+10x=17 | | (8x-15)=(7x-30) | | 7x+3-5x=13-3x | | x/14x+25=32 | | 8=10=4x | | 5x=-2=+x | | 5.5-m=-4.5-1m | | -2(-8w+6)-8w=2(w-3)-4 | | 8(u+5)=-8u+24 | | 18=5(x+6)-3x |