Question

Va rog ajutati-ma !Pana la 20:00!Dau coroana+5 stele!

Answer 1

[tex] \frac{a+b+c}{2} =5,25= \frac{525}{100} = \frac{21}{4} [/tex]

$a+b+c= \frac{21ori2}{4} = \frac{21}{2} = \frac{21ori5}{10} = \frac{105}{10} =10,5$
a=b+2,8⇒ b=a-2,8
a=c+5,45⇒ c=a-5,45

a+b+c=a+a-2,80+a-5,45=10,5
3a-8,25=10,50
3a=18,75
$a= \frac{1875}{100} ori \frac{1}{3} = \frac{625}{100} =6,25$
a=6,25 ⇒b=6,25-2,80=3,45
c=6,25-5,45=0,8

Answer 2

a+b+c=15,75 deoarece a+b+c supra 3=5,75
a+b+c=a+a-2,80+a-5,45=10,5
3a-8,25=10,50
3a=18,75
a=6,25 ⇒b=6,25-2,80=3,45
c=6,25-5,45=0,8