If it's not what You are looking for type in the equation solver your own equation and let us solve it.
-3z+9z=18
We move all terms to the left:
-3z+9z-(18)=0
We add all the numbers together, and all the variables
6z-18=0
We move all terms containing z to the left, all other terms to the right
6z=18
z=18/6
z=3
| y*2+14=50 | | 7776=6^n-1 | | 7776=6^(n-1) | | 10x+6=7x+20 | | 6x^2+5=2x | | x+50=30 | | 0=cx21 | | 2(12x-9)=24x= | | 2x^2-6x-99=7x | | 5a-7=3a-9 | | 19d-16d-d-d=12 | | 9u-7u+2=17 | | x=34.5x5 | | x/0.36=0.6/54 | | n-6.5=1.1n= | | 120-10x=20 | | 20+5d=50 | | 72-8q=16 | | 72-8p=16 | | 6r^2+9=-118 | | 3n+4=5(n-2)-25 | | 8d+6-94=180 | | 8d+6-94=90 | | 8d+6+94=90 | | 11x+4=7x-4=90 | | -x-4+3x=-5-18 | | 348=8(b-4)+12b=348 | | 4x-50+5=180 | | (x+72)(3x)=180 | | d=6(h)+17.7 | | 30+66+x+x=180 | | 7(e+7)=42 |