If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12x+4x+9=0
We add all the numbers together, and all the variables
16x+9=0
We move all terms containing x to the left, all other terms to the right
16x=-9
x=-9/16
x=-9/16
| 0=3.5x^2+21x+31.5 | | 4x+3+9x-27=180 | | 4x+12+10x+15=180 | | 12x^2-12x=25 | | 12x^2-12x=25 | | 8x-17+2x+49=45 | | 8x-17+2x+49=45 | | 9x=3•12 | | -16t^2+20t-1=0 | | -16t^2+20t-1=0 | | -16t^2+20t-1=0 | | 4x-7*11=76 | | 4x-7x11=76 | | 16^x=1000 | | 16^x=1000 | | 38+(3x-8)+(4x+18)=180 | | 38+(3x-8)+(4x+18)=180 | | 38+(3x-8)+(4x+18)=180 | | 38+(3x-8)+(4x+18)=180 | | 38+(3x-8)+(4x+18)=180 | | 8(5x-3)=-2/3(27x+36) | | 2.25x2-4x=0 | | 2.25x2-4x=0 | | 2a-18=3a+2 | | 2a-18=3a+2 | | 1/2r+15=65 | | 7^4x-3=0 | | 4.39x=9 | | Y=12x^2-22 | | x=17-2*2x+1 | | 21r-7–r-5=-52 | | 6(4+5e)=2 |