Need some math help here

[gutharius]

Here is the equation:

(y * 0.2) - y = 33500

What is y?

It would be educational to me if you showed how you derived this.

I know this is fairly simple I just can't remember my basic algebra enough to figure out how to do it.

 

[JoeKing]

PEMDAS

 

[gutharius]

Yes I know PEMDAS just not sure how to apply it.

 

[ucdbiendog]

hint: factor y out of the left side

 

[ucdbiendog]

wtf is PEMDAS?

 

[gutharius]

To get y on one side and factor out the 0.2

 

[StevenYoo]

(y * 0.2) is just 0.2y

0.2y - y = 33500

(0.2y - y) is like doing 0.2 - 1, so we get:

-0.8y = 33500

then we divide both sides by -0.8

y = -41875

 

[JoeKing]

n/m

 

[ucdbiendog]

Originally posted by: gutharius
To get y on one side and factor out the 0.2

factor the 0.2 and the coefficient in front of the other y term

 

[JoeKing]

Originally posted by: ucdbiendog
wtf is PEMDAS?

order of operations.

 

[ucdbiendog]

Originally posted by: JoeKing

Originally posted by: ucdbiendog
wtf is PEMDAS?

order of operations.

u people and your fancy terms

 

[Soccer55]

0.2*y-y=33500
Factor out a y to get: (0.2-1)*y=33500
Order of operations says do parentheses first so we get -0.8*y=33500
Divide both sides by -0.8 to get your answer of y=-41875

-Tom

 

[maziwanka]

how old is the OP?

 

[imported_LoKe]

It's PEDMAS, not PEMDAS. -,-
Unless you americans are different

 

[royaldank]

-41875 as previously stated

 

[hypn0tik]

Originally posted by: maziwanka
how old is the OP?

15 I'm guessing.

 

[scorpmatt]

Originally posted by: LoKe
It's PEDMAS, not PEMDAS. -,-
Unless you americans are different

was always taught to do the multiplication first, what if there is a 4*5 over a 2? doing the m first makes more sense

 

[gutharius]

Originally posted by: StevenYoo
(y * 0.2) is just 0.2y

0.2y - y = 33500

(0.2y - y) is like doing 0.2 - 1, so we get:

-0.8y = 33500

then we divide both sides by -0.8

y = -41875

Thank you! I guess I would have got it if I notated it correctly. It was the Multiplication symbol and the minus sign that were causing me fits cause i thought i had to find a way to rectify those first...

 

[imported_LoKe]

He's got to be in grade 9 math, so...14/15?

 

[JoeKing]

Originally posted by: LoKe
It's PEDMAS, not PEMDAS. -,-
Unless you americans are different

it's interchangable. multiply or divide from the order you see it left to right.

 

[akubi]

Originally posted by: LoKe
It's PEDMAS, not PEMDAS. -,-
Unless you americans are different

division and multiplication are equivalent. same for addition and subtraction......

 

[scorpmatt]

Originally posted by: LoKe
He's got to be in grade 9 math, so...14/15?

or its been a few years and he had to retake this in college

 

[gutharius]

Originally posted by: maziwanka
how old is the OP?

27 Been out of school for 5 years and IT Support does not requeire much math les i am working with excel. Even then it is basic stuff.

 

[gutharius]

Originally posted by: scorpmatt

Originally posted by: LoKe
He's got to be in grade 9 math, so...14/15?

or its been a few years and he had to retake this in college

No passed it the first time around.

 

[Mrvile]

Originally posted by: hypn0tik

Originally posted by: maziwanka
how old is the OP?

15 I'm guessing.

Nah, this is like 7th to 8th grade math though.