Question

7=40/z-1
z=
what dose the z equal?

Answer 1

`z = (47)/(7) = 6 (5)/(7)`

Explanation:

`7 = (40)/(z - 1) \\ 7(z - 1) = 40 \\ 7z - 7 = 40 \\ 7z = 40 + 7 \\ 7z = 47 \\`

`\boxed{\bold{Answer:{\boxed{\green{\bold{z = (47)/(7) = 6 (5)/(7)}}}}}}`

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Answer 2

z = 5

Explanation:

7=40/z-1

- Add 1 to both sides.

8 = 40/z

- Multiply z to both sides.

8(z) = 40/z (z)

8z = 40

z = 5