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vova2212 [387]
3 years ago
13

Please help if you can❤️

Mathematics
1 answer:
castortr0y [4]3 years ago
7 0

Answer:

The answer to your question is below

Step-by-step explanation:

First system

                      2x  -   2y  =   12

                     -2x  -  3y   = -22

                       0   -  5y  =  -10

                                 y = -10 / -5

                                 y = 2

           Solution   (x , 2)

Second system

                     2x  -  6y  =  10

               -2(    x  +  8y  =   5)

                     2x - 6y  =  10

                   -2x - 8y   = -10

                      0  -14y = 0

                               y = 0 / -14

                               y = 0

                     2x - 6(0) = 10

                             2x = 10

                               x = 10/2

                               x = 5

             Solution (5, y)              

Third system

                 4(3x  -  y =  - 5)

                    x   + 4y = 7                              

                 12x - 4y = -20

                    x  + 4y = 7

                 13x + 0y = -13

                     x = -13/13

                     x = -1

                   -1 -+ 4y = 7

                          4y = 7 + 1

                          4y = 8

                            y = 8/4

                            y = 2

              Solution (x, 2)

Forth system

                   x  -   y   =  2

                 2x +   y   = 13

                 3x          = 15

                   x = 15/3

                   x = 5

            Solution  (5, y)

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