Question

a+b+c=977. a+b=561. b+c=753. a,b,c=? a+b+c=292. a+b=136. a-b=120. a,b,c=?

Answer 1

1) a+b+c=977
a+b=561
c=977-561=416
b+c=753
a=977-753=224
224+416=640
b=977-640=337

a=224
b=337
c=416

verificare:
224+337+416=977


2) a+b+c=292
a+b=136
c=292-136=156

a+b=292-156
a+b=136
a-b=120
adunam ultimele doua relatii
2×a=136+120
2×a=256
a =256:2
a=128
128+156=284 (a+c)
b=292-284=8

a=128
b=8
c=156

verificare:
128+8+156=292

Answer 2

problema 1
753-561=192
192=b
561-192=369
369=a
753-192=561
561=c 
nu am avut timp sa o scriu pe a doua sper ca team ajutat