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miner
miner miner
  • 23-03-2014
  • Mathematics
Answered

7b ÷ 12 = 4.2                  What is b?

Verified Answer :

smeiller smeiller
  • 23-03-2014

7b / 12 = 4.2

4.2 * 12 = 50.4

50.4 / 7 = 7.2

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Lilith
Lilith Lilith
  • 23-03-2014

\(\frac{7b }{12} = 4.2 \ \ /*12 \\ \\7b=4.2*12\\ \\7b= 50.4 \ \ \/:7\\ \\\frac{7}{7} \ b= \frac{50.4 }{7}\\ \\b= 7.2\)


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