Question

образец: 126х + 7(2у - 13)=126х + 7*2у-7*13=126х+14у-91​

Answer 1

Ответ:

1) 7 ( x - 2 )

7x - 7 × 2

7x - 14.

2) 5 ( y- 3 )

5y - 5 × 3

5y - 15

3) 3 ( 15 y + 7 ) + 2 ( 4x + 5 )

45y + 21 + 8y + 10

45y + 31 + 8

4) 6x + 5 ( x - 4 )

6x + 5 - 20

11x - 20