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# Algebra

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Solve the system of equations

3x−y=6

6x+y=21

Oct 15, 2019

#1
+109202
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3x  −y = 6

6x + y = 21                add these equations

9x    =    27               divide both sides by 9

x  =   3

Using either equation to find y

3(3) - y  = 6

9 -  y  =    6         add y to bothsides, subtract 6 from both sides

3   =   y

So  (x, y)   = (3, 3)

Oct 15, 2019
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