If it's not what You are looking for type in the equation solver your own equation and let us solve it.
31-3x=121
We move all terms to the left:
31-3x-(121)=0
We add all the numbers together, and all the variables
-3x-90=0
We move all terms containing x to the left, all other terms to the right
-3x=90
x=90/-3
x=-30
| 3x+8x+4X=6x=63 | | -6x+7=-5x+7 | | 5(x)-68=x | | 8a+(5×(4/3)a)=22 | | (X^2-x-1)(x^2-x-2)=338 | | 2(x-4)-3=-5(x-1) | | m^2=-68 | | (w-2)^2=9 | | (w-2)^2=24 | | 4n^2-1=-10n | | 7.9y–12.4–2.3y=15.6y= | | x2+2x–4=0 | | 40=2v+3v | | 8a+(5+(4/3)a)=22 | | 8(x-3)+14=2(4x-5) | | 2x-5=-3x^2 | | 5.8w+(-29w)-18=5.2 | | X+x×0,2=3325 | | 4a-2a=20 | | 2n-80=0 | | 8x^2-22=0 | | 9z-5z=4 | | 30/10x=-30/10 | | 2(x-1/2=8+2x | | 344=-16x^2+96x+190 | | 3/4e+8=11 | | 3x-18-8x=-2+10+1 | | -7(-9x-22)=(x665) | | 4h+5=-9h | | 0=30x^2-15x-30 | | 3(y+3)=y+13 | | 2(3+2x)=x-4 |