х+60=200:4
х+60=50
х=50-60
х=-10
Проверяем
-10+60=200:4
50=50
x = 200:4 -60
x= 50 -60
x= -10
-10+60 = 200:4
50 = 50
х+60=200:4
х+60=50
х=50-60
х=-10
Проверяем
-10+60=200:4
50=50
х+60=200:4
x = 200:4 -60
x= 50 -60
x= -10
-10+60 = 200:4
50 = 50