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romanna [79]
4 years ago
13

1.Solve.

Mathematics
1 answer:
maks197457 [2]4 years ago
8 0

Answer:

The answer to your question is below

Step-by-step explanation:

1.-                           y = 2x - 64

                            x - 2y = 14

Substitution

                            x - 2(2x - 64) = 14

Simplification

                            x - 4x + 128 = 14

                             x - 4x = 14 - 128

                            -3x = - 114

                               x = 114/3

                               x = 38

                             y = 2(38) - 64

                             y = 76 - 64

                             y = 12

Solution (38, 12)

2.-                            y = x - 6

                               3x + 2y = 8

Substitution

                               3x + 2(x - 6) = 8

Simplification

                              3x + 2x - 12 = 8

                              5x = 8 + 12

                              5x = 20

                              x = 20 / 5

                            x = 4

                             y = 4 - 6

                             y = -2

Solution (4 , -2)

3.-                           x - y = 12

                            27 + 3y = 2x

                            x = 12 + y

                            27 + 3y = 2(12 + y)

                            27 + 3y = 24 + 2y

                            3y - 2y = 24 - 27

                                     y = -3

                             x = 12 - 3

                             x = 9

Solution y = -3

4.-                          y = 2x + 14

                           -4x - y = 4

                            -4x - (2x + 14) = 4

                            -4x - 2x - 14 = 4

                            -6x = 4 + 14

                            -6x = 18

                                x = 18/-6

                                x = -3

                            y = 2(-3) + 14

                            y = -6 + 14

                           y = 8

Solution   y = 8

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