Question

Solve: 2z – (7- 5z) – 21 = 0

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Answer 1

Step-by-step explanation:

2z-7+5z-21=0

2z+5z-14=0

7z-14=0

7z=14

z=14/7

z=2

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Answer 2

Step-by-step explanation:

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

2z-7+5z-21=0

7z-28=0

7z=28

z=28÷7

z=4