Suma a 3 numere este 1229 . Al doilea nr e de 2 ori mai mare decat primul si cu 14 mai mic decat al treilea . Multumesc :D

2
a+b+c= 1229 b= 2a b+14=c rezulta a+2a+2a+14=1229 5a=1229-14 5a=12215 unde a=1215:5 rezulta a=243 b=243x2 b=486 c=486+14 c=500

Răspunsuri

2014-02-19T18:16:16+02:00
Notezi cu a,b,c numerele => b=2a;b=c- 14=> c= b+14;a=b/2=>a+b+c=b+b+b/2+14= 1229=>5b/2=1215=>b=1215 x 2/5=486=>a=243;c=500;
a --- ;
b --- ---;
c --- --- + 15;
a + b + c: --- --- --- --- --- +14= 1229=> --- = 1215/5= 243 = a; b= 243 x 2 = 486; c = 500
Vrei si metoda grafica?
Da multumesc .
dar de unde 1215?
1229-14,scuze ca am omis
2014-02-19T18:19:12+02:00