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457=(5,75*U+6.75*2,9)30 U=-0.76 How?

Guest Aug 11, 2017
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 #1
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457=(5.75*U+6.75*2.9)*30  simplify inside the parentheses

 

457 = ( 5.75 U  +  19.575 ) *30      distribute the 30 across the terms in the parentheses

 

457  =  172.5 U + 587.25            subtract 587.25 from both sides

 

-130.25  = 172.5 U     divide both sides by 172.5

 

- 0.755 = U ≈   -0.76

 

 

cool cool cool

CPhill  Aug 11, 2017
edited by CPhill  Aug 11, 2017
 #2
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Wow, thank you very much!

First time using this website and it seems to be great. Glad there's people like you in this world.

 

// Arvin

Guest Aug 11, 2017

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