-7/3
Пошаговое объяснение:
5 × ( x + 4 ) + x = 6
5x + 20 + x = 6
5x + x = 6-20
6х=-14
х=-14/6
х=-7/3
проверка
5 × ( -7/3 + 4 ) + (-7/3) = 6
5 × ( -7/3 + 12/3 ) -7/3 = 6
5 × 5/3 -7/3 = 6
25/3 -7/3 = 6
18/3 = 6
6=6
верно
х = -2 1/3
5х + 20 + х = 6
6х = 6 - 20
6х = -14
х = -14 : 6
х = -7/3 = -2 1/3
Проверим:
5 * (-2 1/3 + 4) + (-2 1/3) = 6
5 * 1 2/3 - 2 1/3 = 6
5 * 5/3 - 2 1/3 = 6
25/3 - 2 1/3 = 6
8 1/3 - 2 1/3 = 6
6 = 6 Верно
-7/3
Пошаговое объяснение:
5 × ( x + 4 ) + x = 6
5x + 20 + x = 6
5x + x = 6-20
6х=-14
х=-14/6
х=-7/3
проверка
5 × ( -7/3 + 4 ) + (-7/3) = 6
5 × ( -7/3 + 12/3 ) -7/3 = 6
5 × 5/3 -7/3 = 6
25/3 -7/3 = 6
18/3 = 6
6=6
верно
х = -2 1/3
Пошаговое объяснение:
5 × ( x + 4 ) + x = 6
5х + 20 + х = 6
6х = 6 - 20
6х = -14
х = -14 : 6
х = -7/3 = -2 1/3
Проверим:
5 * (-2 1/3 + 4) + (-2 1/3) = 6
5 * 1 2/3 - 2 1/3 = 6
5 * 5/3 - 2 1/3 = 6
25/3 - 2 1/3 = 6
8 1/3 - 2 1/3 = 6
6 = 6 Верно