Question

Solve using an appropriate method.
5x -9y = 7,
7y -3x = 5

Answer 1

rewrite so the x and y line up
5x-9y = 7
-3x+7y=5
now lets eliminate a variable
multiple top by 3, bottom by 5 to cancel out
15x-27y=21
-15x+35y=25
add them together
8y=46
y = 46/8
you can do solve for x by plugging in y

Answer 2

I guess Im not uderstanding how you get the 45x-27y=21 or the -15x=35y=25

Answer 3

Did I do something wrong here?

Answer 4

you want to change the 2 equations, so one of the variables cancel out, i picked x just out of preference. to do this you need to make the x in both equations cancel out

Answer 5

can you show me the process of that because Im not totally getting it. I guess I need to see it broke down

Answer 6

I'm using the matrix method but I got something different.... Integers in fact for both x and y... And they're huge...