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miskamm [114]
4 years ago
5

Select all the equations where z=5z=5z, equals, 5 is a solution.

Mathematics
1 answer:
Serhud [2]4 years ago
8 0

Answer:

A, D and E

Step-by-step explanation:

A.

8 = z + 3

Subtract 3 from both sides

8 -3 = z + 3-3

5 = z

z = 5

B.

z - 1 = 6

Add 1 to both sides

z - 1+1 = 6 + 1

z = 7

C.

20 = \frac{40}{z}

Multiply through by z

z * 20 = \frac{40}{z} * z

20z = 40

Divide through by 20

\frac{20z}{20} = \frac{40}{20}

z = 2

D.

12z = 60

Divide through by 12

z = 60/12

z = 5

E

12 + z = 17

Subtract 12 from both sides

-12 + 12 + z = 17 - 12

z = 5

Hence:

A, D and E answers the question

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