a)a+b+c=134
a)a-x=30
b-x=35
c-x=51
a-x+b-x+c-x=30+35+51
a+b+c-3x=116
(Fiindca a+b+c=134 , atunci inlocuim )
134-3x=116
-3x=134-116
-3x=18
x=18: -3
x= -6
a-x=30
a-6=30
a=30+6
a=36
b-x=35
b-6=35
b=35+6
b=41
c-x=51
c-6=51
c=51+6
c=57
Verificare:
36+41+57=
=77+57=
=134
b)a+b+c=134
a+x=48
b+x=53
c+x=69
a+x+b+x+c+x=48+53+69
a+b+c+3x=170
Fiindca a+b+c=134 , atunci inlocuim)
134+3x=170
3x=170-134
3x=36
x=36:3
x=12
a+x=48
a+12=48
a=48-12
a=36
b+x=53
b+12=53
b=53-12
b=41
c+x=69
c+12=69
c=69-12
c=57
Verificare:
36+41+57=
=77+57=
=134
Sper ca ti-am fost de ajutr. Imi dai te rog coronită???
