If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3z=6.42
We move all terms to the left:
3z-(6.42)=0
We add all the numbers together, and all the variables
3z-6.42=0
We move all terms containing z to the left, all other terms to the right
3z=6.42
z=6.42/3
z=2+0.42/3
| x−31/4=2 | | 12.9y+10=34+9.9y | | 6b+14=11b-6 | | 26=x3 | | 99=12x-45 | | 2h+3+1=3h-5 | | 3.45=g/3 | | f(4)=4+9 | | z-1=19 | | Y=8(0.25))x | | 1.2=0.03x+0.21 | | -2m-2=-1-3m-7 | | 4x+15+9x+2=-126 | | 8y=11y-30 | | 1.2=0.03x+0.21* | | 2+7r=10+9r | | 0.2x-0.4=-0.1x+0.6-0.4x | | 3-x^2+25=4+4x-2x-x^2+1 | | 4x-18+2x+12=90 | | 9z-3-6z=5+4z | | a+45=3a+33 | | y-37=4 | | 7a+10-8a=7 | | 3y-9=24 | | t-88=-6 | | 2=13x+15 | | -2r+1-9r=9-10r | | 1.6×x=24 | | 37=2+7x | | g=49=-47 | | 72=34+19x | | 81+(r-4)^2=r^2 |