Himpunan penyelesaian dari persamaan no 3 dan 4

Penjelasan dengan langkah-langkah:

3x + 5y = 13

3x + y = 5

_________-

0 + 4y = 8

4y = 8

y = 8/4

y = 2

__

Substitusi

3x + y = 5

3x + 2 = 5

3x = 5 – 2

3x = 3

x = 3/3

x = 1

hp = {1,2}

4.)

2x + 3y = 56 |×1

x + 2y = 34 |×2

___________

2x + 3y = 56

2x + 4y = 68

___________-

0 – y = -12

-y = -12

y = 12

substitusi

x + 2y = 34

x + 2.12 = 34

x + 24 = 34

x = 34 – 24

x = 10

= x + y

= 10 + 12

= 22