Question

stiind ca a+b+c=56 a:b=2r7 si b:c=3r3 aflati numerele.

Answer 1

a+b+c=56
a:b=2r7⇒a=b2+7
b:c=3r3⇒b=3c+3⇒a=6c+6+7
a+b+c=56
6c+13+2c+7+b=9c+20=56|-20
9c=36|:9
c=4
b=3c+3=4*3+3=15
a=2b+7=15*2+7=37
a=37;b=15;c=4

Answer 2

a=2b+7
c=(b-3)*3
c=3b-9
2b+7+b+3b-9=56
6b+7-9=56
6b+7=64
6b=54
b=9
a=2*9+7=25
c=(9-1)*3=24