35 + x = 200 - 140
35 + x = 60
x = 60 - 35
x = 25
35 + 25 = 200 - 140
60 = 60
490 - x = 100 + 210
490 - x = 310
x = 490 - 310
x = 180
490 - 180 = 100 + 210
310 = 310
ИЗИ
35 + x = 200 - 140
35 + x = 60
x = 60 - 35
x = 25
35 + 25 = 200 - 140
60 = 60
490 - x = 100 + 210
490 - x = 310
x = 490 - 310
x = 180
490 - 180 = 100 + 210
310 = 310
ИЗИ