What is y? (A math question)

[D_J01]

X = Y - (Y x Z), given: X = 28,300 and Z = 0.15, what is Y

[Erklat]

For me it's 33294,11 unless this is some kind of a joke. I'm no great mathematician either.

[Hondacity]

same as above

[D_J01]

Thanks. Can you provide the solution of how you got to the answer?

[Hondacity]

substitute the given values of z and x

28300 = y - 0.15(y)

28300 = 0.85(y)

transpose

y = 33294.11

[K404]

X = Y- 0.15Y

X = 0.85Y

Y = X/0.85

Or.....

Y = Hondacitys post. Dare you to write that


This is y'know..... day 1 of algebra stuff You just starting out?

[Erklat]

Post us some moar

[Gunslinger]

duh, Y = the 25th letter of the alphabet.

[OldChap]

I'm bad at math, so the equation 2n+2n is 4n to me.

[little_scrapper]

Better get a good handle on that algebra. Its nothing compared to multi-variable calculus (calc 3).

Although, I maybe cannot really justify that statement. After you get a handle on calc `1 & 2, calc 3 "seemed" to actually get easier. Hell i had a harder time with Trig then I did with calc. It took alot of work, for me at least, to remember all those damn trig identities.

[matari]

Calculus 3 is just calculus 1 with multivariables. , is not that hard unless your are focusing on some of the proofs.

[badbaker`]

I have no idea, I did trade and business maths. The dumb maths.

[Sparky]

duh, Y = the 25th letter of the alphabet.

lol

[Judaeus Apella]

duh, Y = the 25th letter of the alphabet.

ROFL!!!

[[XC] MarioMaster]

At first I couldn't figure it out, and it bugged me so I got out a piece of paper and some math information began to switch back on in my brain

So:
X = Y - (Y x Z)
Fill in knowns - 28300 = Y - (Y * 0.15)
Simplify1 - 28300 = Y - (0.15Y)
Rewrite as addition - 28300 = 1Y + -0.15Y
Simplify2 - 28300 = 0.85Y
Divide - 28300/0.85 = 33294.12

Y = 33294.12

Answer checking:
28300 = 33294.12 - (33294.12 * 0.15)
28300 = 33294.12 - (4994.12)
28300 = 28300

TI-83 confirms answer correct (I actually copied this wrong the first time with X = 23800 which actually results in much nicer round numbers)

[masterg]

Calculus 3 is just calculus 1 with multivariables. , is not that hard unless your are focusing on some of the proofs.

calc 3 change the coordinate system and everything becomes the triple integral of 1 ;p

[Kallenator]

I solved it in a ridiculous silly way, but got the same answer for y. Apparently solving simple equations for me is like creating a storm in a glass of water.

y = x/(1-z)

[schoolslave]

I solved it in a ridiculous silly matter, but got the same answer for y. Apparently solving simple equations for me is like creating a storm in a glass of water.

y = x/(1-z)

That to me seems the easiest solution as well.