Question 747338
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Solve by substitution.
X+3Y=15
2x-3y=3
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<pre>
You have two equations

    x + 3y = 15,    (1)
   2x - 3y =  3.    (2)


They want you solve it by the substitution method.
For it, from equation (1) express  x = 15 - 3y  and substirute it into equation (2), replacing x there

    2*(15-3y) - 3y = 3.


Simplify it and find 'y'

    30 - 6y - 3y = 3,

    30 - 3 = 6y + 3y,

      27   =    9y

       y   =    27/9 = 3.


Now  x = 15 - 3y = 15 - 3*3 = 15*9 = 6.


<U>ANSWER</U>.  x = 6,  y = 9.


You may substitute these values into original equation
to make sure that this answer is correct.
</pre>

Solved.


The answer in the post by @lynnlo is incorrect, so please ingnore it.