Răspuns :
a+b+c=939
a-78=b-95=c-40
a-78=b-95, b=a+17
a-78=c-40, c=a-38
a+a+17+a-38=939
3a-21=939, 3a=939+21, 3a=960, a=320
b=337, c=282
a-78=b-95=c-40
a-78=b-95, b=a+17
a-78=c-40, c=a-38
a+a+17+a-38=939
3a-21=939, 3a=939+21, 3a=960, a=320
b=337, c=282
a+b+c=939
a-78=y=>y+78=a 78+95= 173
b-95=y->y+95=b
c-40=y=>y+40=c
3y+173=939
3y=939-173
=766
y=766:3
a-78=y=>y+78=a 78+95= 173
b-95=y->y+95=b
c-40=y=>y+40=c
3y+173=939
3y=939-173
=766
y=766:3