1) 25 - х + 15 = 40 - х
2) 21 × х × 3 = 21 х × 3
3) 12 + (8 - х) = 12 + 8 - х = 20 - х
4) 11(х × 9) = 11 × 9х
5) 6(х + 7) - 4х = 6х + 42 - 4х = 2х + 42
6) (15 - 2х)4 = 60 - 8х
1) 25 - х + 15 = 40 - х
2) 21 × х × 3 = 21 х × 3
3) 12 + (8 - х) = 12 + 8 - х = 20 - х
4) 11(х × 9) = 11 × 9х
5) 6(х + 7) - 4х = 6х + 42 - 4х = 2х + 42
6) (15 - 2х)4 = 60 - 8х