If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-5+81a^=31
We move all terms to the left:
-5+81a^-(31)=0
We add all the numbers together, and all the variables
81a-36=0
We move all terms containing a to the left, all other terms to the right
81a=36
a=36/81
a=4/9
| m-60/6=4 | | 3/5=9/x+2 | | 10^(x-2)=10^(4x-14) | | 5u^2=20 | | 1/2x+4=1/5+7 | | 5y=-225 | | 29=c+14 | | k/6+37=33 | | x^2-x-42=x2−x−42 | | 15=14v | | r-8/10=5 | | 19h-15h=16 | | 50=15v | | 93=3(m+20) | | 3d-1=-7 | | 88=-8(s+51) | | 19=11+2s | | 2x+43=7x11 | | −10=2x−4 | | 6x-8.7=5+4x | | 72=6(q-86) | | 3/4x=14=20 | | 6p-4p=18 | | 4(v-54)=92 | | -7-4b=-3b+4 | | -7−4b=-3b+4 | | (x-4)=23-2x | | 11w-5=-3w-19 | | 2.6a=11.6 | | -17.72+11.3q=-12.39+12.6q | | 8m-20-17=15m+19 | | 8m−20−17=15m+19 |