help will give medal

Question

anonymous · Answer

Mindy wants to solve the following system using the elimination method:

y = x – 4
y = 2x – 3

What number should the equation y = x – 4 be multiplied by to eliminate x? (4 points)

 
 	
	–1
	–2
	–4
	–6

anonymous · Answer

@Godlovesme

godlovesme · Answer

So in the second eqn we have 2x right and in the first one we have x which means 1x

anonymous · Answer

yes

anonymous · Answer

so if we have 1x and 2x doesnt that mean we can solve for x ??

godlovesme · Answer

So in order to eliminate we need to change that x 
So we would multiply with -2 which will give us -2x 
So now we have -2x and 2x so if u add them u will get 0 and that's how u eliminate :) 
Got it?

anonymous · Answer

ya i think so so basically ur taking x - 2x = -2x ??

godlovesme · Answer

No I multiplied x by -2 
U might be wondering where I got the -2 from  ? 
Well in the second eqn I have 2x which means the 2 is POSITIVE so I should multiply with the same # but different sign

anonymous · Answer

then how do u get -2x from muliplying

godlovesme · Answer

-2 * 1x 
-2 * 1 = -2 and u just bring the x down which will give u -2x

anonymous · Answer

oh ok i get it

godlovesme · Answer

Great! :)

anonymous · Answer

so the answer is -2 right ?

godlovesme · Answer

Yup!

anonymous · Answer

mmk i have a few more

godlovesme · Answer

I'll try but I might leave unexpectedly , as always