-3(5-7x) + 4(x-7= -3 5 + 3 7x + 4 x - 4 = -15 + 21x + 4x - 2= 21x + 4x - 15 - 2= 25x - 43
Ответ: 25x - 43
-3(5-7x) + 4(x-7
= -3 5 + 3 7x + 4 x - 4
= -15 + 21x + 4x - 2
= 21x + 4x - 15 - 2
= 25x - 43
Ответ: 25x - 43