Answer:
z = 15
Step-by-step explanation:
[tex] \frac{40}{z + 1} = \frac{15}{6} \\ [/tex]
Cross multiply
That's
[tex]15(z + 1) = 40(6) \\ 15z + 15 = 240[/tex]
Send 15 to the right side of the equation
[tex]15z = 240 - 15 \\ 15z = 225[/tex]
Divide both sides by 15
[tex] \frac{15z}{15} = \frac{225}{15} \\ [/tex]
We have the final answer as
z = 15
Hope this helps you
