Пошаговое объяснение:
2)
(7a + 8)/3 = 2
7a + 8 = 2 * 3
7a + 8 = 6
7a = 6 - 8
7a = -2
a = -2 : 7
a = -2/7
3) = -3x - 2y - 5y + 9x - 2x + 4y = 4x - 3y
Пошаговое объяснение:
2)
(7a + 8)/3 = 2
7a + 8 = 2 * 3
7a + 8 = 6
7a = 6 - 8
7a = -2
a = -2 : 7
a = -2/7
3) = -3x - 2y - 5y + 9x - 2x + 4y = 4x - 3y