Question

3b+28=100 как не врублюсь!!!

Answer 1

$3b+28=100$
$3b=72$
$b=72:3$
$b=24$
$Otvet:24$

Answer 2

3b + 28 = 100
3b = 100 - 28
3b = 72
b = 72 : 3
b = 24

проверка:
3b + 28 = 100
3 * 24 + 28 = 100
72 + 28 = 100
100 = 100