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
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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