What is the answer to 7=(40)/z-1 ?

The answer to 7=(40)/z-1 is z=5

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7=(40)/z-1

7 = \frac{40}{z} - 1

z = 5

Solution steps

7 = \frac{40}{z} - 1

Move

1

to the left side

8 = \frac{40}{z}

Multiply both sides by

z

8 z = 40

Divide both sides by

8

z = 5

Verify Solutions

Find undefined (singularity) points:

z = 0

Combine undefined points with solutions:

z = 5

\frac{x - 3}{3 - x} = 3

\frac{90}{p} - 2 = p - 1

\frac{4}{x} - 5 = \frac{5}{2 x}

20 = \frac{40}{z}

\frac{x - 3}{x - 4} = 1