Question

desenati numerele a si b, stind ca sunt direct proportionale cu 5 si 8, iar difereta lor este egala cu 45
rapid
DAU COROANA

Answer 1

{ a,b } d.p { 5,8 }
--------------------/----------------
a - b = 45
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a / 5 = b / 8 = K
a / 5 = K => a = 5 K
b / 8 = K => b = 8 K
8 K - 5 K = 45
3 K = 45
K = 45 : 3
K = 15

a = 5 x 15 = 75
b = 8 x 15 = 120

Answer 2

a/5=b/8=k
b-a=45
-------------------
a=5k
b=8k
8k-5k=45
3k=45
k=45:3
k=15
a=5*15=75
b=15*8=120
Verificare : b-a=120-75=45