Can you please help me rearrange this equation and make z the subject:
x = z +1/4z
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Start by adding like terms. This becomes x = 5z/4. Now divide both sides by 1.25. You have z = 4x/5
EDIT Sorry, should have been x = 5z/4
Multiply both sides by 4 to get therefore
Last edited by AmberLamps; Feb 24th 2010 at 01:35 PM.
Reason: woops left laptop too slow :)
Both satx and Amber Lamps assumed that you mean x= z+ (1/4)z.
If you meant, instead, x= z+ 1/(4z), multiply the entire equation by 4z to get which is the same as .
Solve that with the quadratic formula:
with a= 4, b= -4x and c= -1.
Thanks everyone that has been a real help
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