If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.3a=2.1
We move all terms to the left:
0.3a-(2.1)=0
We add all the numbers together, and all the variables
0.3a-2.1=0
We move all terms containing a to the left, all other terms to the right
0.3a=2.1
a=2.1/0.3
a=7
| 46=6y-2 | | 26=2(w) | | F(n)=-50(n)^3+2400(n)^2-2000 | | 103=v+43 | | 42=3(m) | | 8b+6b=-14 | | 6(x-1)+3=105 | | 18x–37=3x-7 | | b•6=42 | | b/4.8=38.832=8.09 | | -2x-9=x-12 | | 37=m-27 | | .3(x+8)=5.4 | | y/4+1/2=y/3+1 | | -20=30+x | | -8p+9p=p | | -2(3x-4)=50 | | -2(x+18)=1/3(27-6x) | | 9b+4,b=-2 | | 9=w=14 | | -14x+7=6x-89 | | 2+1.25f=10-2.75f2+1.25f= | | 21+14=7x+8x-10x | | -7w=-4w-3 | | 61/28+a=19/4a-17/7 | | -5y+8=10 | | 7d+4=10d–23 | | (240)/(x+20)+(240)/(x)=8 | | 4w+2w=24 | | 5k≥=45 | | 2z-18=3z-64 | | 8-1/3y=0 |