Solve the system of equation by graphing.

Question

x+y=8

7x+7x=56 

 

Determine the solution of the system of equations. Select The correct choice  below and, if necessary, fill in the answer box to complete your choice.

 

A). The Solution is ___, ( type order pair.)

B). The are infinitely many solutions.

C). There are no solutions.

Answer 1

                                X+y =8

                               7X+7X=14

 

                                X+Y =8

                                14X=14

                                      ____    ___

                                      14          14       ------>  Divide both sides by 14

                                          X=1

 

                            X+Y =8                                               X=0      0+Y=8        X=5   5+ Y=8

                            1 +Y=8                                                                  Y=8                 -5      =5

                                                                                                                                 Y=3                                                                                                                             

                           -1        -1

                             __________________

                                 Y=7                                 Infinitely Many