Question

9. Află suma
numerelor a, b, c
dacă:
• (85 - a) x 2 = 10
• (45:b): 3 = 3
• (c:7): 8 = 56

Answer 1

(85-a)×2=10

85-a=5

a=85-5

a=80

(45:b):3=3

45:b=9

b=45:9

b=5

(c:7):8=56

c:7=448

c=3136

a+b+c=80+5+3136=3221

Answer 2

Salutare!

(85-a)x2=10

(85-a)=10:2

85-a=5

a=85-5

a=80

(45:b):3=3

(45:b)=3×3

45:b=9

b=45:9

b=5

(c:7):8=56

(c:7)=56×8

c:7=448

c=448×7

c=3 136

a+b+c=?(suma)

80+5+3 136=85+3 136=3 221(suma)