Question

X + y = 8 kg
3000x + 5000y = 27.000
tentukan spldv d atas menggunakan metode gabungan

Answer 1

X+y=8 | dikali 3 | 3x+3y=24 3x+5y=27 | dikali 1 | 3x+5y=27 (dikurangi) -2y=-3 y=1,5 y=1,5 => x+y=8 x+1,5=8 x=8-1,5 x=6,5

Answer 2

3000x=27000-5000y
x=27000-5000y/3000
x+y=8 kg
27000-5000y/3000+3000=8 kg
27/3-2y/3=8 kg
9-2y/3=8 kg
-2/3y=-1 kg
y=3/2
y=1,5 kg disub. ke persamaan x=27000-5000y/3000
x=27000-7500/3000
x=195/30=6,5 kg