We are given the equation
2z - 9 = 7
Firstly, collect the like terms
2z = 7 + 9
2z = 16
Divide both sides by 2
2z/2 = 16/2
z = 8
Substitute z = 8 back to the previous equation
We have
2(8) - 9 = 7
16 - 9 = 7
7 = 7
Therefore, the value of z that makes the equation 2z - 9 = 7 true is 8
The answer is 8