# Simultaneous equations

1. May 26, 2007

### CathyLou

Hi.

I'm working through a Statistics question and have reached two simultaneous equations that I just can't seem to sove. Could someone please help? I'd really appreciate it.

The two equations are:

1.65 - x = -0.5244y

and

1.78 - x = 0.8416y

Thank you.

Cathy

2. May 26, 2007

### CathyLou

Oh, by the way, I have the solutions (x = 1.70 and y = 0.095) but I just don't know the method to obtain them.

Thank you.

Cathy

3. May 26, 2007

1-u can simply make equation one -equation 2

so x is removed &u'll have equation in y only so u can get Y value

2-or also,u can get x in terms of y,like 1.65 +0.5244y = x

then replace x in 2nd equation with this new X

got it???

4. May 26, 2007

### neutrino

To find the value of one variable, you need to eliminate the other. Do you know how to do that?

5. May 26, 2007

### CathyLou

Could you please show me as I tried this and did not get the correct answers?

Cathy

6. May 26, 2007

### neutrino

One way of doing it, as mado suggested, would be to subtract one equation from the other.

7. May 26, 2007

### malawi_glenn

Can you show us what you did?

8. May 26, 2007

### CathyLou

I've got it now.