Question

aflati numerele de forma 4x67y2 cu bara deasupra,daca suma cifrelor sale este 23

Answer 1

4x67y2(cu bara deasupra) are suma cifrelor 23
4+6+7+2=19
23-19=4
x+y=4
x=0 y=4
x=1 y=3
x=2 y=2
x=3 y=1
x=4 y=0
numerele sunt:
406742, 416732, 426722, 436712, 446702

Answer 2

4+x+6+7+y+2=23⇒19+x+y=23⇒x+y=4⇒x,y∈[[0,4],[1,3],[2,2],[3,1],[4,0]]⇒5 variante de raspuns;
⇒numerele gasite sunt:406742,416732,426722,436712,446702;