Question

a + b + c = 212
b : a = 3 r 5
c : b = 2 r 7
a = ?, b = ?, c =?

Answer 1

Răspuns:

b=a×3+5

c=b×2+7

a |--------|

b |--------|-------|-------|---|+5. }212

c |--------|-------|--------|-------|-------|-------|---|+5|---|+5|---|+7

Explicație pas cu pas:

scădem ce e in plus 212-(5+5+5+7)=212-22=190

190 ÷10 (segmente)=19 adică a

b=19×3+5=57+5=62

c=62×2+7=124+7=131

verificare 131+62+19=212