Di ketahui 5 x + 2 y = – 3 dan 7x + 8 y = 1 .nilai y – x =​

SPLDV

5x + 2y = -3 | ×4

7x + 8y = 1 | ×1

—Menjadi—

20x + 8x = -12

7x + 8x = 1

_______________-

13x = -13

x = -1

5x + 2y = -3

5(-1) + 2y = -3

-5 + 2y = -3

2y = -3 + 5

2y = 2

y = 1

Maka nilai y – x = 1 – (-1) = 1 + 1 = 2

Semoga membantuu 🙂