# How do I find the meaning of x in: 0,3x-6-x=-4,6 ? ;/

1. Sep 6, 2011

### MathNub

How do I find the meaning of x in: 0,3x-6-x=-4,6 ? ;/

Last edited: Sep 6, 2011
2. Sep 6, 2011

### eumyang

Re: 0,3x-6-x=-4,9

Do you know how to solve linear equations?

3. Sep 6, 2011

### MathNub

Re: 0,3x-6-x=-4,9

0,3x-6-x=-4,6|+6
0,3x-x=1,4
-0,3x=1,4|:0,3
x=4,(6)

And I am lost now ;/ That number isn't right

4. Sep 6, 2011

### eumyang

Re: 0,3x-6-x=-4,9

This isn't right. 0,3x - x does not equal -0,3x. It may be easier to think of it as;
0,3x - 1x
(a variable without a coefficient really means that the coefficient is 1)
So what does this equal to?

5. Sep 6, 2011

### MathNub

Re: 0,3x-6-x=-4,9

-0,7x=1,4|:0,7
x=2

0,3*2-6-2=0,6-8=-7,4

But then we get the wrong answer.

6. Sep 6, 2011

### eumyang

Re: 0,3x-6-x=-4,9

No... the bold should be -0.7, not 0.7.

No... you need to follow the order of operations! Ignoring that we have the wrong answer for the moment, the multiplication comes first, then the 1st subtraction, and then the 2nd subtraction. You multiplied, and then did -6-2, which is wrong.