Question

1. Afla numarul
(100- b : 3) +5= 490
necunoscut​

Answer 1

(100 - b : 3) + 5 = 490;

100 - b : 3 = 490 - 5;

100 - b : 3 = 485;

-b : 3 = 485 - 100;

-b : 3 = 385;

-b = 385 x 3;

b = -1155;