"Solve Simultaneously."

"2x+3y=8

3x+2y=7"

"5x-4y=27

4x-5y=18"

I know I have to add/subtract somewhere...But not sure where...

Can someone help me, please?

Printable View

- February 24th 2009, 12:02 AMsuckatmathssolving simultaneously...?
"Solve Simultaneously."

*"2x+3y=8*

*3x+2y=7"*

"*5x-4y=27*

*4x-5y=18"*

I know I have to add/subtract somewhere...But not sure where...

Can someone help me, please?

- February 24th 2009, 12:23 AMADARSH
-We are gonna get the value of x from first equation

-We will put that in second equation

-This gives an wequation in y

-Get value of y

-And thus the value of x

__1st one:__

2x+3y = 8

2x = 8 - 3y

Hence

Put the value of x as in 1

Hence

Hence

Thus

And

__2nd One ;__

Put the value of x from 1 here

Hence

Thus