Question

1. 3x+2y=Rp.280.000,00
1x+3y=Rp.210.000,00

2. 5x+2y=Rp.4.000,00
2x+3y=Rp.2.700,00

3. 3x+2y=180
2x+5y=225

Metode Eliminasi

Answer 1

1)
3x +2y=280.000
| x3 | 9x +6y = 840.000
x +3y=210.000
| x2 | 2x +6y = 420.000
7x = 420 000
x =420000/7
x =60 000
x =Rp.60.000.00

3x +2y =280000
2y =280000 -3(60000)
2y =280000 -180000
2y =100000
y = 100000/2
y = 50000
y = Rp.50.000.00

2)
5x+2y=4000
|x3| 15x +6y = 12000
2x+3y=2700
|x2| 4x +6y = 5400
11x = 6600
x =6600/11
x =600

5x+2y=4000
2y=4000 -5(600)
2y=1000
y =500

3)