<PRE><B>Question 271707</B>
ok

6x - 9y = 25.5
2x - 7y = -10.5

Lets Find y

  6x - 9y = 25.5
-3(2x - 7y = -10.5)

6x - 9y = 25.5
6x + 21y =  10.5

30y = 36

Divide by 30 

{{{y = 1.2}}}

OK lets plug this in. to find x.

2x - 7y = -10.5

2x - 7(1.2)= -10.5

2x - 8.4 = -10.5

add 8.4 to 8.4 and -10.5

2x = -2.1

divide by 2 to both sides

{{{x = -1.05}}}

Lets check if it works!! =]



2x - 7y = 10.5 

2( -1.05) - 7 ( 1.2) = -10.5

-2.1 - 8.4 = -10.5

-10.5 = -10.5

It works! Cya


Any more questions: send them to tobiasz.chris@gmail.com







 
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