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PtichkaEL [24]
3 years ago
14

What is the value of 3x when x = 7?

Mathematics
2 answers:
notsponge [240]3 years ago
7 0
Replace x with seven and multiply

3(7)=21
matrenka [14]3 years ago
6 0
Its 3(7) which equals 21
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Answer: Melanie swam 63 minutes more in second week.

Step-by-step explanation:

Given ,  Time taken by Melanie in first week to swim = 142 minutes

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