If it's not what You are looking for type in the equation solver your own equation and let us solve it.
999+t=1000
We move all terms to the left:
999+t-(1000)=0
We add all the numbers together, and all the variables
t-1=0
We move all terms containing t to the left, all other terms to the right
t=1
| 19*n=209 | | 100+x=500 | | -8x-21=-20x-87 | | −4(−3n−8)+3=10n+20+3 | | 2x11,2x-20=10+1,2x | | 9(p-35)=27 | | 6x–1=5+4x | | 14c-11+13=2+8c | | 25^x-23*(5^x)-50=0 | | `10x+4=184` | | -17-17s=-4+10s-13 | | 6x+5=9+5xx | | 20+18k+k=17k-8 | | 5.6a+14=64.4 | | -y=11-2y | | 29+x=75 | | -12+19h=3+20h | | 44+x=76 | | X-2(2x-3)=5-x | | w-106=4 | | 4y—6=-14 | | 10p+20=-2p-16 | | s+100=101 | | t-28=2 | | ((3+1)/m)=2 | | g. X-3,7=4,3 | | -8r+r^2+16=0 | | -8+r^2+16=0 | | 20/4p=2 | | -8r+r^2=16 | | (y-9)-(y+5)=9y | | Y=12+7y |