Guys please help I keep trying to get help and people keep bringing my score down and it’s due in a bit please help if you know how to do this, I will mark brainliest

Point is the only one not undefined

You move the constant to the right side and change its sign to be 9z= -6 -8. that’s the first step.the second step would be calculate the difference of -8-6 to get -14. you equation should now be 9z=-14the last step is to divide both sides by 9 to get z=-14/9hope this