Dik= 3x + 5y=4 X – 3Y =6 DIT=2X +3 y=…?

Jawaban:

2x + 3y = 3

Dengan X = 3 dan y = -1

Penjelasan dengan langkah-langkah:

Diketahui :

(i) 3x + 5y=4

(ii) X – 3Y =6

Ditanya :

2X +3 y =…?

Jawab :

(i) 3x + 5y=4

(ii) X – 3Y =6

Eliminasi :

3x + 5y=4 l×1l 3x + 5y = 4

X – 3Y =6 l×3l 3x – 9y = 18

——————— –

14y = – 14

y = -14/14 = -1

Substitusi :

X – 3y = 6

X – 3(-1) = 6

X + 3 = 6

x = 6 – 3

x = 3

Maka, 2x + 3y = 2(3) + 3(–1) = 6 + (–3) = 6 – 3 = 3