Question

400 - x = 170
400 - x = 270
x - 80 = 90 * 7
x - 80 = 90 * 5
x : 6 = 56 + 44
x : 6 = 156 + 44

Answer 1

1) x=400-170
х=230
2) х=400-270
х=130
3) х-80=630
х=630+80
х=710
4) х-80=450
х=450+80
х=530
5) х=(56+44)×6
х=100×6
х=600
6) х=(156+44)×6
х=200×6
х=1200