miner
miner
24-03-2014
Mathematics
contestada
7b ÷ 12 = 4.2 What is b?
Respuesta :
smeiller
smeiller
24-03-2014
7b / 12 = 4.2
4.2 * 12 = 50.4
50.4 / 7 = 7.2
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Lilith
Lilith
24-03-2014
[tex]\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[/tex]
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