2x+3y=13 x+2y=10 Dengan metode subtitusi adalah..?

Materi : SPLDV

Pembahasan :
x + 2y = 10 —» x = 10 - 2y

Substitusi...
2x + 3y = 13
2(10 - 2y) + 3y = 13
20 - 4y + 3y = 13
20 - y = 13
y = 20 - 13
y = 7

Substitusi...
x = 10 - 2y
x = 10 - 2(7)
x = 10 - 14
x = -4

Hp : {-4 , 7}

x+2y=10
x=10-2y
Subtitusikan x = 10-2y
2x+3y=13
2(10-2y)+3y=13
20-4y+3y=13
20-y=13
20-13=y
7=y
Subtitusikan y=7
x+2y=10
x+2(7)=10
x+14=10
x=10-14
x=(-4)