If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3-8-15=a
We move all terms to the left:
3-8-15-(a)=0
We add all the numbers together, and all the variables
-1a-20=0
We move all terms containing a to the left, all other terms to the right
-a=20
a=20/-1
a=-20
| 2x+25=19 | | 0=-16t^2+8t+48 | | (-7n+8)=6 | | 39-7k=-1-8(2k+4) | | 43/100=95/x | | 2q+3=-7+3q | | 8(6-2k=8(5-3k) | | 2x+25=+19 | | 3x(x+28)=90 | | 20=x/3-8 | | 6y-13-11=168 | | -2x-5=13-(4x-2) | | 3x+8=8x+7 | | 10x-24=26 | | 4x+2+3x=(2*18) | | 10x-3x+102=10x+42 | | -6+8p=9p | | 1000x-x=4136.36-4.136 | | ♥♥♥♥+xxx=♥ | | 4=8/x+2 | | /9f-11=14f+4 | | (3x+24)+(7x-16)=180 | | 39-7k=1-8(2k+4) | | 8x-15+25=90 | | 6x+2x+-9=31 | | 14w−8w=18 | | 2x4/6-2=4 | | -3+4x-4=1 | | 0=−16t^2+8^2+48 | | 2(x-1)+2(2x+5)=120 | | -0.5=-0.67x-1.1 | | x-32.6=-82.25 |