If it's not what You are looking for type in the equation solver your own equation and let us solve it.
=390-8A
We move all terms to the left:
-(390-8A)=0
We add all the numbers together, and all the variables
-(-8A+390)=0
We get rid of parentheses
8A-390=0
We move all terms containing A to the left, all other terms to the right
8A=390
A=390/8
A=48+3/4
| 2x+1=-6x+9 | | x+1x+9=3x-1 | | 9p+15=42 | | 4/3+x=11/3 | | (x^2)=10 | | (5)/(12)=(-8)/(x) | | 120+4x+2x=180 | | 12+p=48 | | 48=p-12 | | x+3+4=22 | | 4x(-)5=90 | | x²+12x=11=231 | | 27=v•0.23 | | 1/9*(x+84)=9 | | 27=v•0,23 | | X•2x=40,5 | | Δx=-8 | | 8/12=6/y | | 4y-14=67 | | p-23=30 | | 3b–9=18 | | c-48=107 | | 340=h-20 | | 44+5x=16x | | k+16=100 | | 219=j+55 | | 5+4(2x+7)=3x-9 | | z-15=45 | | 4x+42=9x | | 9/4+y=23/4 | | 57=q+25 | | X+2x+5+X=45 |