Gemgirl8899 Gemgirl8899
  • 03-11-2015
  • Mathematics
contestada

Change the subject of the formulae to b::: 8a + 3b = 12. And 3b^2=27

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TSO
TSO TSO
  • 03-11-2015
8a + 3b = 12
3b = 12 - 8a

[tex]b = \frac{12-8a}{3}[/tex]


And...

3b^2 = 27
b^2 = 9
[tex]b = \pm 3[/tex]
b = 3
b = -3
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