If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12x+8-x=31
We move all terms to the left:
12x+8-x-(31)=0
We add all the numbers together, and all the variables
11x-23=0
We move all terms containing x to the left, all other terms to the right
11x=23
x=23/11
x=2+1/11
| 21-8x=27-8x | | -7b25;b=-4 | | 5/8(x-1/3)=26 | | 5/8(x-1/3)=-26 | | 21y-82=180 | | 14x6-39x3+27=0 | | 11-9d=10 | | -7x-2(0.5+5)=-13 | | 4x+3=6x13 | | -47-7x+4x=37 | | -45=x-50 | | 23=y/5-11 | | 5x+30=2x-5 | | 2=r/8 | | z/(z+22)=12 | | (4,-7);m=-(1)/(4) | | 72d=432 | | 2(n-1)=-2-3n | | y=9.8+-0.10*42 | | 32-7=-6x-18 | | -4x(x-11)=16 | | 0.2k-4.21-0.8k=2(-k-0.1) | | 72=4c | | 5(4z-3)^2=-10 | | 3y-130=180 | | 4(9x-5)=160 | | 4-x=3(2+x) | | 0.2k-2.41-0.8k=2(-k-0.1) | | 4x²+3x+9=0 | | -4/7(x-4)=3/7 | | 2x-13x-119=46 | | 4x+2(3x-3)=-6+14x |