Объяснение:
а) (5x - 1) - (2 - 8x) + 2 =
= 5x - 1 - 2 + 8x + 2 = 13x - 1
б) 7(2a - 3) + 6a - 12 =
= 7 * 2a - 7 * 3 + 6a - 12 =
= 14a - 21 + 6a - 12 =
= 20a - 33
в) 64 - (14 + 7x) =
= 64 - 14 - 7x =
= 50 - 7x
Объяснение:
а) (5x - 1) - (2 - 8x) + 2 =
= 5x - 1 - 2 + 8x + 2 = 13x - 1
б) 7(2a - 3) + 6a - 12 =
= 7 * 2a - 7 * 3 + 6a - 12 =
= 14a - 21 + 6a - 12 =
= 20a - 33
в) 64 - (14 + 7x) =
= 64 - 14 - 7x =
= 50 - 7x