If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x-3+2x-9=12
We move all terms to the left:
x-3+2x-9-(12)=0
We add all the numbers together, and all the variables
3x-24=0
We move all terms containing x to the left, all other terms to the right
3x=24
x=24/3
x=8
| -3x+10=5-4 | | 3x-4x=2x-11 | | 0,15y+6=-39 | | 10k=71 | | X+1/4+2x-3/5=-3/4 | | 1/3y-10=1/8y | | -0,3y+6=-39 | | -2-8.5(1-9h)=30.5 | | -8(3x+2)=152 | | 32=4u-16 | | X^2+45x=550 | | -7x+12=-8x+1 | | 2x+9=5/4 | | -9x+4x+5x=-10 | | -0,3y-54=0 | | 7+9x=124 | | (x-2)^2x^2+(x+2)^2=35 | | -12x+1=-35 | | w^2=50 | | w^2+7=57 | | T^2+6t-60=0 | | 2x+5x-9x-2x=-2+10 | | (X^+3x)^2=14(x^2+3x)-40 | | 93=3v^2+9 | | -8c-7+5=20 | | C+5c-4c=8 | | 35=-7+5(s-3) | | 32^x-4=64 | | 3+8(-4+n)=-85 | | 6/x=7/21 | | -3(x-14)=-72 | | 9=3x+8 |