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Please help me with these two questions, I don't really understand what the difference is. ><
In 2004, the cost of organizing the concert was $385.
In 2005 the cost was 10% less than in 2004.
Calculate the cost in 2005.
And then the next question on the paper...
The cost of $385 in 2004 was 10% more than the cost in 2003.
Calculate the cost in 2003.
My friend told me about this, and I just don't get how it works!
x = y
Times x to both sides.
x² = xy
Times -y^2 to both sides.
x² - y² = xy - y²
Factorise.
(x + y )(x - y) = y(x - y)
Then... divide both sides by (x - y).
x = x + y?!
How is this possible? The algebra is correct as far as I can see.
da frend hu told mi is super cool and awesome
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