Question

Afla numarul necunoscut :
(525:5 +b ): 5 + 12= 720

Answer 1

(525:5+b):5+12=720
(105+b):5+12=720
(105+b):5=720-12=708
105+b=708x5=3540
b=3540-105
b=3435

Answer 2

(525:5 + b): 5 + 12 = 720
(105 + b): 5 + 12 = 720
(105 + b): 5 = 720 - 12
(105 + b): 5 = 708
105 + b = 708 * 5
105 + b = 3540
b = 3540 - 105
b = 3435