Question

va rog sa ma ajutati la Ex nr 6 Se stie ca:a:b=3; Află :3a-4b+5c. b:2=C; a-b=40.

Answer 1

a:b=3⇒a=3b
b:2=c⇒b=2c
a-b=40
3b-b=40
2b=40⇒b=20
b=2c⇒ c=10
a=3b⇒a=60
3a-4b+5c= 180-80+50= 150
R:150