emuzzy06 emuzzy06

13-09-2020
Mathematics

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2n-21 = n over 4 (in fraction form) two column proof

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ropafadzonyadome ropafadzonyadome

13-09-2020

Step-by-step explanation:

2n-21=n/4 (× b.s by 4)

4(2n-21)=n

8n-84=n

8n-n=84

7n=84 (÷ b.s by 7)

n=12

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