Question

Tentukan Himpunan Penyelasian dari sistem persamaan
a) 2x-3y=17 dan 3x+y=9
b) x-y=3 dan 2x+3y+16
Dengan Metode Eliminasi
Please Jawab dgn Benar yah...

Answer 1

A.) 2x-3y = 17 (*3)
3x+y =9 (*2)

6x-9y = 51 3x+y = 9 6x+2y = 27 3*2.18+y = 9
-11x = 24 6.54+y = 9
x = 24/11 y =9 - 6.54
x =2.18 y =2.46

b.) x-y = 3 (*2)
2x+3y = 16 (*1)

2x-2y = 6 x-y =3
2x+3y = 16 x-(-2) = 3
-5y = 10 x+2 = 3
y = 10/-5 x = 3-2
y = -2 x = 1