Help Please!!!!!!!!!!

Solve these equations using the addition property.
3x - 4y = 7
3x + 2y = -5
The lines intersect at ( __, __ )

Question

Help Please!!!!!!!!!! 


Solve these equations using the addition property. 
3x - 4y = 7 
3x + 2y = -5 
The lines intersect at ( __, __ )

anonymous · Answer

Um... I can help you

anonymous · Answer

You have to do it like this:$$(3x-4y=7)(-1)$$
In order to find the y you have to multiply by a negative number.
It becomes like this:
-3x+4y=-7
3x+2y=-5
You sum and or subtract the numbers and you obtain:
-3x+3x=0
4y+2y=6y
-7-5=-12

anonymous · Answer

Then from here it's easy to see that y=-2. From this point onward you have to substitute y in one of the original equations in order to find the x

anonymous · Answer

Just like this:
3x-4y=7
3x-4(-2)=7
3x+8=7
3x=-1
x=-1/3

anonymous · Answer

So the answer to your question should be that the lines intersect at (-1/3,-2)

anonymous · Answer

Is it okay? Did you understand?