DAU COROANA 100%VA ROG!!!
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Răspuns:
Explicație pas cu pas:
y/b = z/c = t/d = x/a = 5
y = 5b
z = 5c
t = 5d
x = 5a
x + y + z + t = 5a + 5b + 5c + 5d = 5*(a + b + c + d) = 5*110 = 550