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Ksenya-84 [330]
3 years ago
8

What is the result of adding these two equations? ​ 2x+3y=-5 5x-y=-12

Mathematics
1 answer:
kondaur [170]3 years ago
4 0

Answer:

x = \frac{-41}{17}  , y = \frac{-1}{17}

Step-by-step explanation:

<u>Step(i)</u>:-

Given equations are  2 x+3 y=-5  ...(i)

                                   5 x-y=-12 ...(ii)

Multiply equation (ii) by '3'

                                    2 x + 3 y  = -5  

                                 <u>  15 x - 3 y  = - 36</u>

                                  17 x  = - 41

                                   x = \frac{-41}{17}

<u><em>Step(ii)</em></u><em>:-</em>

<em> Substitute </em>x = \frac{-41}{17}<em>  in equation (i)</em>

<em>         </em>                      2 (\frac{-41}{17}+3 y=-5

                                 3 y = - 5 + \frac{82}{17}

                               3 y = \frac{-85 + 82}{17} = \frac{-3}{17}

                               y = \frac{-1}{17}

<em>The solution of the two equations </em>

 ( x, y ) = (\frac{-41}{17} , \frac{-1}{17})

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