is this right? Might be easy!

Question

is this right?  Might be easy!

undeadknight26 · Answer

A system of equations is shown below.

-3x + 7y = -16
-9x + 5y = 16

Part A: Create an equivalent system of equations by replacing one equation with the sum of that equation and a multiple of the other. Show the steps to do this. (6 points)
-3x + 7y = -16
*-3  *-3   *-3
9x + -21y = 48
@SolomonZelman

solomonzelman · Answer

I honestly don't get the question, it's too abstruse for me.
I wish can help you.

undeadknight26 · Answer

oi know any one that can help me?

solomonzelman · Answer

do you get the question, if you explain what's the question I can help you, before I leave.

undeadknight26 · Answer

I believe all i have to do is make another equation that has the same answer as one of the equations already there and solve it.

anonymous · Answer

I think it means that you replace the first equation with its sum and the multiple of the other equation

solomonzelman · Answer

just solve for x and y and make up some other equation knowing    y and x are equal to whatever you found them to be equal to.

solomonzelman · Answer

IDk, not sure.

undeadknight26 · Answer

It might be what @VIbarguen1 said too!

anonymous · Answer

that question is really confusing....

anonymous · Answer

@SolomonZelman  could you help me with mine?

anonymous · Answer

@SolomonZelman  is giving you how to solve it... the issue is setting up the system correctly...

undeadknight26 · Answer

@SolomonZelman it is correct it meets up with the old equations points.  thx 4 ur help!

solomonzelman · Answer

Figured it out?

undeadknight26 · Answer

yea now i just have to explain how to find the point from 9x + -21y = 48...

solomonzelman · Answer

how to find the point? Do you mean "coordinate" if yes, then plug random numbers for x.

solomonzelman · Answer

Do you need coordinates?

undeadknight26 · Answer

yes.  I already know that:
-3x + 7y = -16
-9x + 5y = 16
equal (-4,-4)
and 
-9x + 5y = 16
9x + -21y = 48
are (-4,-4) but i don't know how to show it.

solomonzelman · Answer

graph the lines, they are supposed to intersect at (-4,-4)

solomonzelman · Answer

You might not be able to do it in here but, I am sure you can graph these lines.

undeadknight26 · Answer

sorry not show it but explain it...or aka show my work.

solomonzelman · Answer

Well you can show them your work -- how you solved for x and y in both equations and say that the answer is (-4,-4).

undeadknight26 · Answer

i think i got it thanks :D