If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2x+2-12=21
We move all terms to the left:
2x+2-12-(21)=0
We add all the numbers together, and all the variables
2x-31=0
We move all terms containing x to the left, all other terms to the right
2x=31
x=31/2
x=15+1/2
| 121-s=145 | | X+1,6=3,2-x | | c+38=98 | | -7(2x-1=21 | | -5(n+4)=-4n-9 | | 5/6c+7/12=11/18c-1/6 | | 5x-3=4+8 | | -k+2-2k=-22 | | 24x^2-24x+8=0 | | -3.14x=41.14 | | x+17=6+2(3x+1) | | 61-11y+33=84+9y | | 2x-0,5=x+3 | | 2.5(2p+5)=5p=12.5-2 | | 2.5(2p+5)=5p=12.5 | | V=1/3×^h | | -0.64x+0.44x=5.4 | | x+17=6+2 | | a-41=26 | | 378=18x | | 12t=-4 | | 77+14x-39=19x-2 | | 4x^2+8x-64=0 | | 77+14x-39=19x2 | | 4y+16=–8 | | 4(1/8t+2)=2(t-8)-1/2t | | -6s+3-8=-20 | | -4(w-4)=4w-16 | | 0.0169=c² | | -2(3k+5)=27-4k | | x+12=9x3 | | x/42=105/3 |