Question

Someone please help me! Im stuck! Medal+Fan
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.

Part B: Show that the equivalent system has the same solution as the original system of equations.

Answer 1

couldn't you just solve for either x or Y and then put that answer into the bottom equation?

Answer 2

x=7y/3 + 16/3

Answer 3

y=3x/7 - 16/7

Answer 4

-7y/3-16/3

Answer 5

Would that be it?? Im confused....

Answer 6

?

Answer 7

no now you plug that into the next equation where ever there is an (x)

Answer 8

How would I do that...? Sorry :(

Answer 9

-9x + 5y = 16

but now put x=-7y/3-16/3 into where ever x is

Answer 10

-9-7y/3-16/3y=17 ?

Answer 11

-9(-7y/3-16/3)+5y=16

Answer 12

Oh

Answer 13

Then what?

Answer 14

distribute -9 into -7y/3-16/3

Answer 15

To where, what number?