Nilai x dan y berturut-turut yang memenuhi persaman x + 5y = 13 2x – y = 4 , adalah…

Jawaban:

HP = {3 , 2}

Penjelasan:

Metode substitusi

x + 5y = 13 …(pers. 1)

2x – y = 4 –> y = -4 + 2x …(pers. 2)

substitusi pers. 2 ke pers. 1

x + 5y = 13

x + 5(-4 + 2x) = 13

x – 20 + 10x = 13

x + 10x = 13 + 20

11x = 33

x = 3

substitusi nilai x ke pers. 2

y = -4 + 2x

y = -4 + 2 × 3

y = -4 + 6

y = 2

HP = {3 , 2}

Jawaban:

HP = {3 , 2}

Penjelasan:

Metode Eliminasi

x + 5y = 13 | × (-2) | -2x – 10y = -26

2x – y = 4 | × 1 | 2x – y = 4 (–)

………………………….-11y = -22

………………………………y = 2

Substitusi nilai y ke pers. 2

x + 5y = 13

x + 5(2) = 13

x + 10 = 13

x = 13 – 10

x = 3

HP = {3 , 2}