Jawab:

HP = {-5 , 2}

Penjelasan dengan langkah-langkah:

#Cara Substitusi

(i). x - 5y = -15

(ii). -3x + y = 17

› Evaluasi pers. (i)

(i). x - 5y = -15

» x - 5y + 5y = -15 + 5y

» x + 5y - 5y = -15 + 5y

» x = -15 + 5y

› Substitusikan nilai x, ke pers. (ii)

(ii). -3x + y = 17

» -3(-15 + 5y) + y = 17

» -3 × (-15) + (-3) × 5y + 1y = 17

» 45 + (-15y) + 1y = 17

» 45 - 15y + 1y = 17

» 45 - 14y = 17

» -14y = 17 - 45

» -14y = -28

» y = -28/-14

» y = 2 ✓

› Substitusi nilai y, ke nilai x

x = -15 + 5y

x = -15 + 5(2)

x = -15 + 10

x = -5 ✓

HP = {-5 , 2}

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#Answer By : 4Rz