Penjelasan dengan langkah-langkah:

bola basket = b, kaki = k, voli = v

2b + k + 3v = 2.500

b + 2k + 2v = 2.050

2b + v = 1.550 >>> v = 1.550 - 2b

2b + k + 3v = 2.500 (×2) 4b+2k+6v = 5.000

b + 2k + 2v = 2.050 (×1) b+2k+2v = 2.050

>>>>>>>>>>>>>>>>>>>>>~~~~~~~~~~~~~~~~ (-)

3b + 4v = 2.950 >>> v = 1.550 - 2b

3b + 4(1.550 - 2b) = 2.950

3b + 6.200 - 8b = 2.950

-(8 - 3)b = -(6.200 - 2.950)

- 5b = - 3.250

b = - 3.250/-5

b = 650 gram

v = 1.550 - 2(650)

v = 1.550 - 1.300

v = 250 gram

b + 2k + 2v = 2.050

650 + 2k + 1.300 = 2.050

2k + 1.950 = 2.050

2k = 2.050 - 1.950

k = 100/2

k = 50 gram

jadi berat masing² bola yaitu :

bola basket = 650 gram

bola kaki = 50 gram

bola voli = 250 gram