Question

(7200-а×200)+2000=3400 уравнение

Answer 1

(7200 - a*200) + 2000 = 3400
7200 - a*200 = 3400 - 2000
7200 - a*200 = 1400
- a*200 = 1400 - 7200
- a*200 =  - 5800
 a*200 =   5800
 a =   5800/200
a = 29