Rearrange all and make the letter red as the subject write 1b, 2b, 3b so do i know which is which

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

Just use long division to write it out