5 Answers

Benchong

Karma: 121185

5n - 2n = 10 - 7

3n = 3

n = 1.

14 years ago. Rating: 3
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Daisy!

Karma: 81130

N=1

I didn't work it the same way, but I got the same answer!

14 years ago. Rating: 3
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Vietnamtam64

Karma: 30

14 years ago. Rating: 2
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munkeyknutz

Karma: 30

N=1

2(1) -7 = - 5

5(1) -10 = - 5

14 years ago. Rating: 2
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Bob/PKB

Karma: 945575

2n - 7 = 5n - 10
2n - 2n -7 +10 = 5n -2n - 10 + 10

3 = 3n
3/3 = 3n/3
1 = n (edited 9/14)

14 years ago. Rating: 1
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Daisy!

Bob/PKB Thank You!!!

commented 14 years ago

Bob/PKB

Hi Daisy! I added the last step because it's what our mind does automatically. I did alot of substitute teaching at junior high, and when the assignments said to show every single step, that would have been included (the last step to get the "unknown" all by itself on one side of the "=" sign. Actually, the first time I worked on the problem last night, I got the wrong answer. Egg all over my face if I'd posted that! Hope your day is as cheerful as you are (you always bring a smile to my world). BobPKB

commented 14 years ago