Question

determinati nr de forma 45xy :5 si au suma cifrelor 19

Answer 1

45xy:5=5xy
5xy=19
xy=19:5
xy=3.8

Answer 2

45xy:5=>y={0,5}
x=cifră
45xy={45x0,45x5}
45x0=4+5+x+0=19->9+x=19/-9->x=10
45x5=4+5+x+5=19=>14+x=19/-14->x=5

45xy={4510,4555}