Question

Latihan soal
Tentukan penyelesaian dari
x+ 3y = 8
4x - 5y = -19
Gunakan metode Substitusi​

Answer 1

Jawaban:

x + 3y = 8

4x - 5y = -19

x = -1

y = 3

Penjelasan dengan langkah-langkah:

x + 3y = 8 (1)

4x - 5y = -19 (2)

pers (1) ➞ x = 8 - 3y

masukkan pers (1) ke pers (2)

4x - 5y = -19

4(8-3y) - 5y = -19

32 - 12y - 5y = -19

-17y = -19 - 32

y = -51/-17

y = 3

masukkan nilai y ke pers (1) yang telah di ubah

x = 8 - 3y

x = 8 - 3(3)

x = -1