1 + 2(3x + 5) = 8Раскроем скобки:1 + 6x + 10 = 8Упростим:6x + 11 = 86x = -3x = -3/6x = -1/2
Проверим:1 + 2(3*(-1/2) + 5) = 81 + 2(-3/2 + 5) = 81 + 2(-3/2 + 10/2) = 81 + 2(7/2) = 81 + 7 = 88 = 8
Ответ: x = -1/2.
1 + 2(3x + 5) = 8
Раскроем скобки:
1 + 6x + 10 = 8
Упростим:
6x + 11 = 8
6x = -3
x = -3/6
x = -1/2
Проверим:
1 + 2(3*(-1/2) + 5) = 8
1 + 2(-3/2 + 5) = 8
1 + 2(-3/2 + 10/2) = 8
1 + 2(7/2) = 8
1 + 7 = 8
8 = 8
Ответ: x = -1/2.