Răspuns :
Metoda grafică ( figurativă )
A |---|
A × 3 |---|---|---|
A × 5 |---|---|---|---|---|
Suma = 2745
1 + 3 + 5 =
4 + 5 = 9 segmente egale
A = 2745 : 9 = 305
A × 3 = 305 × 3 = 915
A × 5 = 305 × 5 = 1525
Verificare :
305 + 915 + 1525 =
1220 + 1525 = 2745
Rezolvare algebrică
A + A × 3 + A × 5 = 2745
A × 9 = 2745
A = 2745 : 9
A = 305
A |---|
A × 3 |---|---|---|
A × 5 |---|---|---|---|---|
Suma = 2745
1 + 3 + 5 =
4 + 5 = 9 segmente egale
A = 2745 : 9 = 305
A × 3 = 305 × 3 = 915
A × 5 = 305 × 5 = 1525
Verificare :
305 + 915 + 1525 =
1220 + 1525 = 2745
Rezolvare algebrică
A + A × 3 + A × 5 = 2745
A × 9 = 2745
A = 2745 : 9
A = 305