Could someone help me please? 3x-

Question

anonymous · Answer

3s minus what?

anonymous · Answer

3x - 4y =5, 2x - y = 1

anonymous · Answer

To sole these problems, we find one variable (say x) in terms of the other in one equation, then chuck it into the other equation.
First, lets take:
$$2x - y =1 $$ 
and make it in terms of y.
So we have:
$$ y = 2x-1$$
Now in the first equation:
$$3x - 4y = 5$$
We substitute y:
$$3x -4(2x -1)=5$$
Upon solving this we have:
$$3x -8x+4=5$$
$$-5x +4 = 5$$
$$-5x=1$$
$$x=-\frac{1}{5}$$
Now we have the value of x. Can you find the value of y yourself?

anonymous · Answer

You way also want to look at:
www.youtube.com/watch?v=cwHR_B9zK7k

anonymous · Answer

Could you maybe get me started, I've been out of school for 24 years and I'm really trying to understand this new generation math

anonymous · Answer

Take a look at the video, I find patrickJMT videos to be really good.

anonymous · Answer

Okay,thank you so much for your help

anonymous · Answer

If you still need help, I'll be back in half an hour.
Good luck!

anonymous · Answer

Thanks