If it's not what You are looking for type in the equation solver your own equation and let us solve it.
240=99-y
We move all terms to the left:
240-(99-y)=0
We add all the numbers together, and all the variables
-(-1y+99)+240=0
We get rid of parentheses
1y-99+240=0
We add all the numbers together, and all the variables
y+141=0
We move all terms containing y to the left, all other terms to the right
y=-141
| 9x+20=10x+18 | | 6/21=x-1 | | -3-8y=-17 | | 48-v=252 | | 6^2x-3x=0 | | 5x=1,735 | | 0=-0.01x^2+x+3 | | d/2+19=9 | | 214=85-v | | X+y(12)=9646 | | 5x+18=9+13x | | `4y=12-12 | | 5y+8=83 | | x+2.5=4.4 | | Y+x(12)=9646 | | 7+t=2t+8 | | 5k+6=213 | | 7^3x-2=1000 | | -8(w-14)=8 | | 1=6x-102=4×+12 | | n+(n^2)+174=180 | | 3x+4(20)=80 | | 7a+2a=1.4 | | x=-4.285714286 | | 5(y–1)=3y+7 | | 35n+49n^2=0 | | 0=6+2v0.5v+3 | | -1x+6=-1+8 | | -x+6=x+8 | | 10x+20+2x+100=360 | | 136=-8+8(5k-7) | | (4x+28)=(9x-2) |