Question

1262. Упростите выражение: 1) 3 (x + 5) + 4x; 2) 8 (7+x) - 3x; 3) 9 (x - 7) + 6x; 4) 5 (x+8) - 11; 5) 2 (13 + x) - 15; 6) 6 (x + 5) + 2x.
Дам 100 баллов​

Answer 1

1) 3 (x + 5) + 4x = 3x + 15 + 4x = 7x + 15

2) 8 (7+x) - 3x = 56 + 8x - 3x = 5x + 56

3) 9 (x - 7) + 6x = 9x - 63 + 6x = 15x - 63

4) 5 (x+8) - 11 = 5x + 40 - 11 = 5x + 29

5) 2 (13 + x) - 15 = 26 + 2x - 15 = 2x + 11

6) 6 (x + 5) + 2x = 6x  + 30 + 2x = 8x + 30