Răspuns:
Explicație pas cu pas:
5.
a + b + c = 15/8
a + b = c + 9/8
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c + 9/8 + c = 15/8
2c = 15/8 - 9/8 = 6/8
c = 6/8 : 2 = 6/8*1/2 = 3/8
_________
a + b = 3/8 + 9/8 = 12/8 = 3/2
b - a = 1/6
a + b + b - a = 3/2 + 1/6
2b = 3/2 + 1/6 = 9/6 + 1/6 = 10/6 = 5/3
b = 5/3 : 2 = 5/3*1/2 = 5/6
a = 3/2 - b = 3/2 - 5/6 = 9/6 - 5/6 = 4/6 = 2/3
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Verificare
2/3 + 5/6 + 3/8 = 16/24 + 20/24 + 9/24 = 45/24 = 15/8
