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Serhud [2]
3 years ago
8

Solve the system using elimination. 2x-5y=-5 x+y=8

Mathematics
1 answer:
gavmur [86]3 years ago
5 0

The solution for the given equations  2x-5y=-5 and x+y=8 are (x, y) respectively (5, 3).

Step-by-step explanation:

The given is,

               2x-5y=-5.................................................(1)

               x+y=8........................................................(2)

Step:1

         By using the elimination method for the above equations are,

        Multiply the equation (2) by 2     ( Eqn(2) × 2)

                 2x+2y=16.............................................(3)

Step:2

       Subtract the Equation (1) and (3),

               2x-5y=-5

               2x+2y=16

      ( - )

      ( 2x - 2x ) + ( -5y - 2y ) = ( -5 - 16 )

                                   -7y = -21

                                       y = 3

Step:3

     Substitute the value of y in Eqn (2),

                                       x+y=8 ............................(2)

                                       x+3=8

                                             x=8-3

                                             x=5

Step:4

    Check for solution,

              Substitute the x and y values in Eqn (1),

                                  2x-5y=-5  ........................(1)

                      (2 × 5) - (5 × 3) = -5

                                   10 - 15 = -5

                                          -5 = -5

Result:

       The solution for the equations 2x-5y=-5 and x+y=8 are (x, y) respectively (5, 3).

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