kaybug

11-03-2008, 11:44 AM

Gotta find x, basically.

7/8x - 1/4 + 1/2x = 3/4 + x

My attempts:

1) 7/8x - 1/4 + 1/2x = 3/4 + x

8(7/8x - 1/4 + 1/2) = 8 (3/4 + x)

7x + 2 + 4x = 6 + 8x

11x + 2 = 6 + 8x

11x + 2 - 2 = 6 - 2 + 8x

11x = 4 + 8x

11x = 4/11 + 8/11x

Ack! Stuck!

2) 7/8x - 1/4 + 1/2x = 3/4 + x

7/8x + 1/2x - 1/4 = 3/4 + x

11/8x - 1/4 + 1/4 = 3/4 + 1/4 + x

11/8x = 4 + x

hmm.. tried continueing but no answer apeared.

The answer is: x = 8/3

Yeeahh, I'm pretty lost.

41.68 = 4.7 - 8.6y

My attempt:

41.68 = 4.7 - 8.6y

100(41.68) = 100(4.7 - 8.6y)

4168 = 470 - 860y

4168 + 470 = 470 + 470 - 860y

4638 = 860y

4638/860 = 860/860

???? = y

@_@ I'm pretty lost on what to do with that one because by hand I get something along the lines of y = 5.740 etc, and by calculator I get something along the lines of y = 5.393 etc.

I'm not really sure what I'm doing wrong.. can you see my mistake, or do you do the steps differently than what I did?

As well, anyone know what topic of algebra this is? XD I've been trying to find help for this problem for a couple of days, but I can't figure out what kind of algebra it is, so my searching has been pretty fruitless.

7/8x - 1/4 + 1/2x = 3/4 + x

My attempts:

1) 7/8x - 1/4 + 1/2x = 3/4 + x

8(7/8x - 1/4 + 1/2) = 8 (3/4 + x)

7x + 2 + 4x = 6 + 8x

11x + 2 = 6 + 8x

11x + 2 - 2 = 6 - 2 + 8x

11x = 4 + 8x

11x = 4/11 + 8/11x

Ack! Stuck!

2) 7/8x - 1/4 + 1/2x = 3/4 + x

7/8x + 1/2x - 1/4 = 3/4 + x

11/8x - 1/4 + 1/4 = 3/4 + 1/4 + x

11/8x = 4 + x

hmm.. tried continueing but no answer apeared.

The answer is: x = 8/3

Yeeahh, I'm pretty lost.

41.68 = 4.7 - 8.6y

My attempt:

41.68 = 4.7 - 8.6y

100(41.68) = 100(4.7 - 8.6y)

4168 = 470 - 860y

4168 + 470 = 470 + 470 - 860y

4638 = 860y

4638/860 = 860/860

???? = y

@_@ I'm pretty lost on what to do with that one because by hand I get something along the lines of y = 5.740 etc, and by calculator I get something along the lines of y = 5.393 etc.

I'm not really sure what I'm doing wrong.. can you see my mistake, or do you do the steps differently than what I did?

As well, anyone know what topic of algebra this is? XD I've been trying to find help for this problem for a couple of days, but I can't figure out what kind of algebra it is, so my searching has been pretty fruitless.