Answer:
The answer is option 1
Step-by-step explanation:
In order to find the value of z, you have to get rid of all the unrelated variable :
[tex]7 - \sqrt{3z + 2} = 4[/tex]
[tex] - \sqrt{3z + 2} = 4 - 7[/tex]
[tex] - \sqrt{3z + 2} = - 3[/tex]
[tex] \sqrt{3z + 2} = 3[/tex]
[tex]3z + 2 = {3}^{2} [/tex]
[tex]3z + 2 = 9[/tex]
[tex]3z = 7[/tex]
[tex]z = \frac{7}{3} [/tex]
