If it's not what You are looking for type in the equation solver your own equation and let us solve it.
5=28.1+0.15a
We move all terms to the left:
5-(28.1+0.15a)=0
We add all the numbers together, and all the variables
-(0.15a+28.1)+5=0
We get rid of parentheses
-0.15a-28.1+5=0
We add all the numbers together, and all the variables
-0.15a-23.1=0
We move all terms containing a to the left, all other terms to the right
-0.15a=23.1
a=23.1/-0.15
a=-154+3.5527136788005E-15/0.15
| 5r-r+8=-4 | | m+233=730 | | 4x-9+4x+16+95=180 | | 7.5h+10=6.25(h-3) | | -7(5x+10)=-350 | | 3/x+5=2/3x+31/6 | | (5x^2+32)+(7x^2)=180 | | z=147+226 | | u=308-246 | | 9+x=7x+21 | | b+60=93 | | 3a+a=110 | | x+38=x+68+90 | | 2(5x-3)=-36 | | 48-1=r | | Y=6/12x | | 9^x-2.3x=3 | | 25t+5=25t+7 | | k=27+37 | | 5³-10²=x(8-2)+2x-3x | | 4+2x=x+16 | | x+38+x+68+90=180 | | u-14=18 | | 45x=15x+120 | | 8w=-4w | | b+33=80 | | r-61=36 | | x+3/4=-9 | | 8d–4d+2d+9=6d | | 4x+6+3x+17+80=180 | | f=56-23 | | d-60=7 |