wdhigh2442
wdhigh2442 wdhigh2442
  • 11-12-2016
  • Mathematics
contestada

Solve for x

[tex] \frac{a}{x} + \frac{b}{c} = \frac{a}{b+c} [/tex]

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 11-12-2016
easy
make denomenators the same

Step 1
multiply both sidesby (x)(c)(b+c)
(a)(c)(b+c)+(b)(x)(b+c)=(a)(x)(c)

Step 2
distribute
acb+ac²+xb²+bxc=axc

Step 3
minus (acb+ac²) from both sides
xb²+bxc=axc-acb-ac²

Step 4
minus axc from both sides
xb²+bxc-axc=-acb-ac²

Step 5
undistribute x
x(b²+bc-ac)=-acb-ac²

Step 6
divide both sides by (b²+bc-ac)
[tex]x= \frac{-acb-ac^2}{b^2+bc-ac} =\frac{acb+ac^2}{ac-b^2-bc}[/tex]
Answer Link

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