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JulsSmile [24]
3 years ago
14

?

Mathematics
1 answer:
jek_recluse [69]3 years ago
7 0

Answer:

The answer to your question is letter C

Step-by-step explanation:

Equations

                             3x  - y  = 14     ----------- (I)

                             4x + y =   21    ----------- (II)

Solve the system of equations by the elimination method.

                            3x -  y  = 14

                            4x + y  = 21

                            7x   0   = 35

Solve for x, divide both sides by 7

                                  7x/ 7 = 35/7                        

                                         x = 5

Substitute x in equation I

                            3(5) - y = 14

                            15 - y = 14

Subtract 15 in both sides

                            15 - 15 - y = 14 - 15

Simplify

                                      - y = -1

Multiply by -1

                                        y = 1

Solution

                                      (5, 1)                          

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