Question

уравнение: (80-х)*5+20=370

Answer 1

(80-х)*5+20=370
(80-х)*5 = 370-20
(80-х)*5 = 350
80-х = 350:5
80-х = 70
х=80-70
х=10
проверка
(80-10)*5+20=370
370=370

Answer 2

прс