Question

3x-8.5 = 2.5x-1.25-0.75x Show steps please?

Answer 1

I got -29. Something tells me that's not right. Help?

Answer 2

solve by combining like terms

first move all terms with variable to one side, then move all constant to the other side

then solve for x

Answer 3

That's what I did. I need someone to check my answer.

Answer 4

I got -29.

Answer 5

I got a different answer. I combined like terms on the right side and then simplified:

3x - 8.5 = 1.75x - 1.25
-1.75x -1.75x
------------------------
1.25x = 9.75


1.25x 9.75
----- = -----
1.25x 1.25


x = ?

Answer 6

So, you got x=7.8?

I've gotten two different answers to this so far. 5.8 and -29. Then you got 7.8 ... I don't know. I must be doing something wrong.

Answer 7

yes, I got 7.8 according to how I solved it above. :)

Answer 8

how did you get -29?

Answer 9

I'll show you my steps for that, hold on...

Answer 10

3x - 8.5 = 2.5x - 1.25 - .75x
3x - 8.5 = 3.25 - 1.25
3x - 3x - 8.5 = 3.25x - 3x -1.25
-8.5 = .25x - 1.25
-8.5 + 1.25 = .25x + 1.25
-7.25 = .25x
-7.25/.25 = .25x/.25
x=-29
That's what I got.

Answer 11

In the second step, .75x was supposed to be subtracted from 2.5x and not added.. :)

Answer 12

do u see that?

Answer 13

Oh! Dur! I totally blipped that. Let me re-work that and see if I get it right this time...

Answer 14

okay! :)

Answer 15

Let me know what u get :)

Answer 16

I got 7.8! I think that's the right answer. Thank you! :D

Answer 17

ur welcome! :)

Answer 18

1.combine like terms on both sides of the equation(3x-8.5=1.75x-1.25
2.1.25x=7.25--You do know to change the sign when moving to other side of equation?
3.x=7.25/1.25
4. x=5.8
5.If you want to check you work you can substitute 5.8 into the original equation and see that 8.9=8.9

Answer 19

sorry, I just checked and @dwelsher is right, it is 5.8. I made a small mistake in my adding... so x = 5.8