Question

Ajutatima la ex 7 la mate va roooooooggggg

Answer 1

a + f = 34
a + b = 26
b + f = 30
le adunam
2a + 2f + 2b = 90    |: 2
a + f + b = 45
inlocuim a + f in relatia de mai sus
34 + b = 45
b = 45 - 34
b = 11 buburuze
inlocuim a + b
26 + f = 45
f = 45 - 26
f = 19 fluturi
inlocium b + f
30 + a = 45
a = 45 - 30
a = 15 albine

Answer 2

f - nr fluturilor
b - nr buburuzelor
a - nr albinelor
i - nr insectelor
i = a + b + f
f + a = 34 => f = 34-a
a + b = 26
f + b = 30
=> f -a = 4
34-a-a = 4
-2a = =-30
a = 15
f = 34-a = 34-15 = 19
b = 30-f = 30-19 = 11
i = 15+19+11 = 45