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February 28, 2015

February 28, 2015

Posted by **Anonymous** on Monday, December 9, 2013 at 12:58pm.

- MATH -
**SAM**, Monday, December 9, 2013 at 1:04pm2X-3Y=5

-2X -2X

-3Y=5-2X

DIVIDE BOTH SIDES BY -3

Y=-5/3+2/3X

NOW DO THE SAME FOR THE OTHER ONE PLUG THE -2 IN FOR X

Y=-5/3+2/3(-2)

PUT IN CALC WATCH SIGNS!!

Y=-3

- MATH -
**X**, Monday, December 9, 2013 at 2:53pmAll you have to do in this situation is substitute (-2) for the variable (x) in the equation. You can do this because all coordinates are of the form (x,y). Anything in the place of (x) can be seen as equal to (x). So, substituting, we can see:

2(-2) - 3y = 5

-4 - 3y = 5

-3y = 9

y = -3

As shown above, we can see that y = -3 when x = -2.

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