Question

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Answer 1

Answer:

Step-by-step explanation:

n/2 - 3n/4+5n/6 = 21

6n-9n+10n/12 = 21

7n = 21*12 = 252

n = 252/7 = 36

3t-2/4 - 2t+3/3 = 2/3-t

9t-6-8t-12/12 = 2-3t/3

t-18/12 = 2-3t/3

3t-54 = 24-36t

3t+36t = 24+54

39t = 78

t = 78/39 = 2

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