Răspunsuri

2014-09-12T15:26:29+03:00
Fie a, b, c necunoscutele

a+b+c= 454 

a+n= 108
b+n= 222
c+n= 397 

108-n+ 222-n + 397-n = 454 
-3n= 454-(108+222+397)
-3n= -273
n= 273:3
n= 91. 

a+ 91= 108
⇒ a= 108-91
a= 17.

b= 222-91
b= 131

c= 397- 91
c= 306 
1 5 1
  • Utilizator Brainly
2014-09-12T15:30:08+03:00
A+b+c=454

a+x=108
b+x=222
c+x=397

Adunam relatiile :
a+x+b+x+c+x=108+222+397
a+b+c+3x=727

454+3x=727
3x=727-454
3x=273
x=91

a+91=108⇒a=108+91⇒a=199
b+91=222⇒b=222-91⇒b=131
c+91=397⇒c=397-91⇒c=306