Question

Stiind ca: a+b+c+d=2999; a+b+c>cu 50 decât b+c+d; d este cel mai mic numar par de 4 cifre diferite; află b+c.

Answer 1

a+b+c+d=2999
a+b+c-50=b+c+d
d=1032
------------------------
b+c=?

a+b+c=2999-1032
a+b+c=1967
b+c+d=1967-50
b+c+d=1917
b+c=1917-1032
b+c=885
a+(b+c)+d=2999
a+885+1032=2999
a+1917=2999
a=2999-1917
a=1082

1082+885+1032=2999

R=> b+c=885