Объяснение:
(3x + 5)(2x + 1) = (6x + 5)(x - 3) + 7
6xкв + 3x + 10x + 5 = 6xкв - 18x + 5x -15 + 7
6xкв + 13x - 6xкв + 13x = -8 - 5
26x = -13
x = -13 : 26
x = - 1/2
Объяснение:
(3x + 5)(2x + 1) = (6x + 5)(x - 3) + 7
6xкв + 3x + 10x + 5 = 6xкв - 18x + 5x -15 + 7
6xкв + 13x - 6xкв + 13x = -8 - 5
26x = -13
x = -13 : 26
x = - 1/2