BEGINNER NEEDS HELP

[Guest]

I'M NEW TO ALGEBRA, NEVER EVER LOOKED AT IT, BUT NOW I MUST GET MY GED. CAN SOMEONE TELL ME WHAT THE ( ) STAND FOR OR EXPLAIN THIS PROBLEM TO ME 2(x-y)=8 where x=6 Please.

THANX.

 

[happy]

2(x-y)=8 where x=6 Please.

2(6-y)=8

12-2y=8

-2y=-4

y=2

Turn that into a ! Algebra is fun!

 

[ctelady]

CAN SOMEONE TELL ME WHAT THE ( ) STAND FOR OR EXPLAIN THIS PROBLEM TO ME 2(x-y)=8 where x=6

Multiply the value outside the ( ) by EACH value inside -->
2x - 2y = 8 Now plug in 6 instead of x -->
12 -2y = 8 [typos corrected]

 

[Denis]

I'M NEW TO ALGEBRA, NEVER EVER LOOKED AT IT, BUT NOW I MUST GET MY GED. CAN SOMEONE TELL ME WHAT THE ( ) STAND FOR OR EXPLAIN THIS PROBLEM TO ME 2(x-y)=8 where x=6 Please. THANX.

Please do not use CAPITAL letters.

2(x - y)
First, a multiplication is implied: 2*(x - y) : * is the multiplication sign; we no longer use "X".
If you see something like 7n, that means 7*n.

The () act as an indicator: perform what's inside brackets first;
2*(10 - 4) = 2*6 = 12
With no brackets: 2*10 - 4 = 20 - 4 = 16 : see what I mean?

Or you can go this way:
2*(10 - 4) = 2*10 - 2*4 = 20 - 8 = 12

Similarly with 2(x - y): 2*x - 2*y is the answer; usually shown as 2x - 2y

Since you're given x = 6, then we have: 2*6 - 2y = 12 - 2y

Since that equals 8, then we have: 12 - 2y = 8
Now we need to find the value of y.
Subtract 12 from each side; this leaves:
-2y = -4
Now divide each side by -2:
y = 2

Did you know that -4/-2 = 2?
If not, you're not ready for this kind of stuff...go study...

I've just given you a teaching lesson (my way); this is not the purpose
of this board; so don't expect it again, hear?

 

[happy]

:shock:

 

[Denis]

:shock:

:roll:

 

[Guest]

:lol:

 

[ryan_kidz]

heh? what's that?

:shock:

 

[Denis]

heh? what's that?
:shock:

That's happy mooning apm :lol:

 

[Guest]

okay here it is step by step
2(x-y)=8 x=6


1. were the x is you put in 6 b/c x is = to 6.
now you have 2(6-y)=8
2. then you * 2*6 and get 12
3 then you * 2*-y and get -2y
so now your problem looks like this 12+-2y=8
4. so now you want to get the variable by itsself the variable is the letter.
so get y by its self to do that you take 12 and you have to move it over to the other side so you have to make it - so take -12 +8= -4
now the problem looks like this -2y=-4
5. finally take the last two numbers and divide you get y=2
the ( ) mean to do what is inside them first

 

[themuddaload]

um ooooooookkkkkaaaayyy your all a little wierd... not that im totally not wierd
=)

 

[ryan_kidz]

:?