Question

Помогите решить уравнение
200 • ( x + 71 ) = 54000
900 • ( 16 - c ) = 5400
400 • ( x - 12 ) = 3600

Answer 1

1) 200х+14200=54000
200х=54000-14200
х=39800/200
х=199
2)14400-900с=5400
-900с=5400-14400
-900с=-9000
с=-9000/-900
с=10
3)400х-4800=3600
400х=3600+4800
400х=8400
х=8400/400
х=21