If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7(c-9)=0
We multiply parentheses
7c-63=0
We move all terms containing c to the left, all other terms to the right
7c=63
c=63/7
c=9
| 1/3f=7 | | 110+15x=25x+50 | | X+(3x+10)=99 | | y-20=100 | | 0.25(x-3)=1.75 | | 2x-7=−3x+18 | | 3.5m+3=9m+5/2 | | 10(y+8)=90 | | -23+-3c=13 | | 0=(x-3)^2-7 | | 7×+7=18-2x | | 19=x+(-12) | | 12=-3n+5 | | -10m+9=2-10m | | (3x+5)+31=6(2x-1) | | 10f-11=9 | | d+355=754 | | b-29=-54 | | 10(y+9)=100 | | 8(n-90)=48 | | q-663=75 | | q−663=75 | | u+114=308 | | n+11=987 | | n+11=987n | | k-150=46 | | 17y^2-62y+49=0 | | 5x²-3x-14=0 | | m-80=406 | | m−80=406 | | 1/2x+2/7=57 | | 4x-16=4(2-3x)-8 |