5(x-1) - 4(x-2) = 15x - 5 - 4x + 8 = 1x + 3 = 1x = 7
7(x-9) - (3x+1) = 7x - 63 - 3x - 1 = 4x - 64 = 4x = 7x = 73/4
Ответ: x = 7, x = 73/4
5(x-1) - 4(x-2) = 1
5x - 5 - 4x + 8 = 1
x + 3 = 1
x = 7
7(x-9) - (3x+1) =
7x - 63 - 3x - 1 =
4x - 64 =
4x = 7
x = 73/4
Ответ: x = 7, x = 73/4