Question

a:b=2r4,b:c=2r4,a+b+c=215​

Answer 1

Răspuns:

Explicație pas cu pas:

a:b= 2 rest 4

a= 2b+4

b:c= 2 rest 4

b= 2c+4

a+b+c=215

Am zis ca a= 2b+4

Inlocium si vom avea

2b+4+b+c=215

3b+ 4+c= 215

3b+c= 215-4

3b+ c= 211

Am zis ca b= 2c+4

Inlocium si vom avea

3 ori (2c+ 4) +c= 211

6c+ 12+c= 211

7c+ 12=211

7c= 211-12

7c=199

C= 199/7

B= 2c+4= 2 ori 199/7 +4=398/7+ 4= (398+ 28)/7=426/7

A= 2b+4= 2 ori 426/7+4= 852/7+4= (852+ 28)/7=880/7