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Posted by **Anonymous** on Monday, December 9, 2013 at 12:55pm.

- MATH -
**SAM**, Monday, December 9, 2013 at 1:09pm5X-Y=3

-5X -5X

-Y=3-5X

DIVIDE BY -1 ON BOTH SIDES

Y=-3+5X

PLUG IT IN PLUG IT IN

7=3-5(X)

SOLVE

SUBTRACT BY 3 ON BOTH SIDES 4=5X

AND DIVIDE BY -5 ON BOTH SIDES 4/5=5/5X

4/5=X

- MATH -
**SAM**, Monday, December 9, 2013 at 1:10pmCORRRECTION!!!!

-4/5!

- MATH -
**X**, Monday, December 9, 2013 at 2:57pmHere, all you have to do is substitute (7) for (y) in the equation. You can do this because all coordinates are of the form (x,y), and any number that is in the place of (y) in this format can be seen as equal to (y).

The working is shown below:

5x - (7) = 3

5x = 10

x = 2

As shown in the working above, x = 2 when y = 7.

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