Odpowiedź :
2a + (3a - 7) = 2a + 3a - 7 = 5a - 7
(4 - 2x) - (7x - 2) = 4 - 2x - 7x + 14 = -9x + 18
(2p - 1) + (3 + 5p) = 2p - 1 + 3 + 5p = 7p + 2
-(3p - x) - (3x - p) = -3p + x - 3x + p = -2p - 2x
2a + (3a - 7) = 2a + 3a - 7 = 5a - 7
(4 - 2x) - (7x - 2) = 4 - 2x - 7x + 14 = -9x + 18
(2p - 1) + (3 + 5p) = 2p - 1 + 3 + 5p = 7p + 2
-(3p - x) - (3x - p) = -3p + x - 3x + p = -2p - 2x