Question

Найти Значение Выражение:

Answer 1

Ответ:

1.

$2x + 5(x - 8) - (5x + 4(x - 3)) = 1.2 \\ 2x + 5x - 40 - 5x - 4x + 12 = 1.2 \\ - 2x = 1.2 + 28 \\ - 2x = 29.2 \: \: \: \: \: | \div ( - 2) \\ x = - 14.6$

2.

$20x - 4(x + 11) + 2.8 = x + 5(4x - 17) \\ 20x - 4x - 44 + 2.8 = x + 20x - 85 \\ - 5x = - 43.8 \: \: \: \: \: \: \: | \div ( - 5) \\ x = 8.76$