Question

1)(7/12)+(-5/8)2)/-1/39/-/2/5/6​

Answer 1

Ответ:

$\frac{7}{12} - \frac{5}{8} = \frac{7 \times 2 - 3 \times 5}{24} = \frac{14 - 15}{24} = - \frac{1}{24}$

Пошаговое объяснение:

2ая запись какая-то непонятная

Answer 2

To simplify the expression, let's first perform the operations step by step following the order of operations (PEMDAS/BODMAS):

1. Parentheses: There are no parentheses in the expression.

2. Exponents: There are no exponents in the expression.

3. Multiplication and Division (from left to right): (7/12) + (-5/8 * 2) / (-1/39) / (-2/5/6)

Now, let's simplify the expression inside the brackets first:

(-5/8 * 2) = (-5/8) * 2 = -5/4

Next, let's perform division from left to right:

(-1/39) / (-2/5/6)

To divide fractions, we invert the second fraction and multiply:

(-1/39) / (-2/5/6) = (-1/39) * (-6/2/5)

Now, simplify the expression inside the brackets:

(-6/2/5) = (-6/2) * (1/5) = -3 * 1/5 = -3/5

Now we have:

(-1/39) * (-3/5) = 3/195 = 1/65

4. Addition and Subtraction (from left to right): (7/12) + (-5/4) / (1/65)

Now, let's perform the division:

(-5/4) / (1/65) = (-5/4) * (65/1) = -325/4

Finally, perform the addition:

(7/12) + (-325/4)

To add fractions, we need a common denominator. The common denominator of 12 and 4 is 12.

(7/12) + (-325/4) = (7/12) + (-325/4) * (3/3) = (7/12) + (-975/12)

Now, add the fractions:

(7/12) + (-975/12) = (7 - 975)/12 = -968/12 = -242/3

So, the simplified expression is: -242/3.