The green slope is 1/4 what is the red line. both lines are parallel

Paralel lines have same slope

if green line is paralell to red line
and the slope of the green line is 1/4
slope of red line is 1/4 also

The answer to that is 6

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