Răspuns :
a+b+c+d=741
a+b+c=673
d+673=741
d=741-673=68
d=4c
c=68/4=17
b=30c=17*30=510
a=741-510-17-68=741-595=146
a+b+c=673
d+673=741
d=741-673=68
d=4c
c=68/4=17
b=30c=17*30=510
a=741-510-17-68=741-595=146
a+b+c+d=741
a+b+c=673
d=741-673=68
d=4*c
c=d:4=68:4=17
c=a:30
a=c*30=17*30=510
a+b+c=673
d=741-673=68
d=4*c
c=d:4=68:4=17
c=a:30
a=c*30=17*30=510