3 buku dan 2 pulpen dengan harga Rp.5.950

Jawaban:

Misalkan : x = buku, y = pulpen

Metode eliminasi

3x + 2y = 5950 |x3| 9x + 6y = 17850

4x + 3y = 8300 |x2| 8x + 6y = 16600

————————- (-)

x = 1250

4x + 3y = 8300

4(1250) + 3y = 8300

5000 + 3 y = 8300

3y = 8300 – 5000

3y = 3300

y = 3300 / 3

y = 1100

x + y = 1250 + 1100 = 2350