Question

2z – ( 7 – 5z ) – 21

= 0 solve this problem​

Answer 1

Answer:

$2z - (7 - 5z) - 21 \\ \\ = 2z - 7 + 5z - 21 \\ \\ = 7z - 28 \\ \\ 7z = 28 \\ \\ z = \frac{28}{7} \\ \\ \\ z = 4$

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Answer 2

Answer:

z = 4

Step-by-step explanation:

2z - ( 7 - 5z ) - 21 = 0

=> 2z - 7 + 5z - 21 = 0

=> 7z - 28 = 0

=> 7z = 28

=> z = 4

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