Question

Помогите с 1 заданием пожалуйста

Answer 1

Ответ:

$1) \: \: \: - 32 - (53 - 72) = - 32 - 53 + 72 = - 85 + 72 = - 13 \\ 40 - ( - 17 + 35) = 40 + 17 - 35 = 57 - 35 = 22 \\ - 12 + ( - 32 - 17) = - 12 - 32 - 17 = - 44 - 17 = - 61 \\ - 38 - ( - 81 + 39) = - 38 + 81 - 39 = 43 - 39 = 4 \\ 75 + ( - 84 + 7) = 75 - 84 + 7 = - 9 + 7 = - 2$

$\frac{4}{9} - ( - 1 \frac{1}{9} + \frac{4}{9} ) = \frac{4}{9} + \frac{10}{9} - \frac{4}{9} = \frac{14}{9} - \frac{4}{9} = \frac{10}{9} = 1 \frac{1}{9}$

$9 - (a + 37) = 9 - a - 37 = - 28 - a \\ - (4 - a + 2) - 118 = - 4 + a - 2 - 118 = - 122 + a \\ b + (78 - b - 19) = b + 78 - b - 19 = 59 \\ -( a + 51) - ( - a - 49) = - a - 51 + a + 49 = - 2$

$4.8 - (5.8 + x) = 1.2 \\ 4.8 - 5.8 - x = 1.2 \\ - x = 1.2 + 5.8 - 4.8 \\ - x = 2.2 \\ x = - 2.2$

$(x + 7.2) - 14 = 2.3 \\ x + 7.2 - 14 = 2.3 \\ x = 2.3 + 14 - 7.2 \\ x = 9.1$