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Artist 52 [7]
3 years ago
6

Which of the following ordered pairs represents the solution to the system given below?

Mathematics
2 answers:
denpristay [2]3 years ago
8 0

x − 3y = 12
<span>2x + 6y = 60</span>

<span>x=12+3y</span>

<span>2(12+3y)+6y=60</span>

<span>24+6y+6y=60</span>

<span>24+12y=60</span>

<span>12y=60-24</span>

<span>12y=36</span>

<span>y=36/12</span>

<span>y=3</span>

<span>and since the only answer you have with y being 3 is 21,3 the answer is D.(21,3)</span>

UkoKoshka [18]3 years ago
8 0
{ x - 3 y = 12  *  ( - 2)
  2 x + 6 y = 60 

- 2 x + 6 y = - 24
  2 x + 6 y = 60
------------------------
          12 y =  36
                 
               y = 36 / 12

               y =  3

For x :

2 x + 6 y = 60

2 x + 6 * ( 3 ) = 60

2 x + 18 = 60

2 x = 60 - 18

2 x =  42

x = 42 / 2

x =  21

Answer D : ( 21,3)  

hope this helps!


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