1) 30 + x > 40x > 40 - 30x > 10
2) 80 - xx = 80
3) 45 - 5 = 4040 = 40 (верно)
4) 38 - 8 < 5030 < 50 (верно)
5) 60 + x = 90x = 90 - 60x = 30
6) x - 8 = 10x = 10 + 8x = 18
1) 30 + x > 40
x > 40 - 30
x > 10
2) 80 - x
x = 80
3) 45 - 5 = 40
40 = 40 (верно)
4) 38 - 8 < 50
30 < 50 (верно)
5) 60 + x = 90
x = 90 - 60
x = 30
6) x - 8 = 10
x = 10 + 8
x = 18