If it's not what You are looking for type in the equation solver your own equation and let us solve it.
4x+12=x-21
We move all terms to the left:
4x+12-(x-21)=0
We get rid of parentheses
4x-x+21+12=0
We add all the numbers together, and all the variables
3x+33=0
We move all terms containing x to the left, all other terms to the right
3x=-33
x=-33/3
x=-11
| 3D-7d=4 | | 4(20-2x)-(5x+9)=32 | | /(0.8+2=0.4w+10/) | | 3+2/5x=11-2/5 | | (6+4)h=130 | | 7(x-2)=6-6+3x | | (6+4)h+20=130 | | -0.8a-68.3a=-27.88+8.6a | | 3x+41=8x-54=12x-108 | | 5x-7=(4x-9)+8 | | x^2-4x=3x-2=28 | | (x-76)+(x-55)=(3x-1) | | 131=7x-1+48 | | (-3)-8x=4+(-x) | | 3k-2(4k+1)=5k+2 | | 7t–4=10t+14 | | -(x-4)=13 | | 3k-2(4k+1)=-k-1 | | 3(x-6)+2(12-3x)=-6 | | X+36=24+x | | a+a+a2+a2=360 | | 11/10+1/2=v | | 3k-2(4k+1)=-5k+1 | | 3+5n=1+8+2 | | F(X)=-5x+9+6(x+3)4 | | x=-1, | | x+5=8x+9 | | 17h-13=19h+19 | | 11x-7=2(x+5) | | 3k-2(4k+1)=-5k-2 | | 19x-12=13x | | -1(x-4)=13 |