Răspuns:
20 RON costa o masinuta
10 RON costa o paleta
40 RON costa o minge
Explicație pas cu pas:
a = minge
b = masinute
c = palete
a + 2b + 3c = 110
c = b/2
a = 2b
2b + 2b + 3(b/2) = 110
4b + 3b//2 = 110 /x2
8b + 3b = 220
11b = 220
b = 220 : 11
b = 20 RON costa o masinuta
c = 20/2 = 10 RON costa o paleta
a = 2 x 20 = 40 RON costa o minge
a + 2b + 3c =
40 + 2 x 20 + 3 x 10 =
40 + 40 + 30 =
110
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