Question

4/15 ÷ x = 2/5 и(-48 3/8 ÷ 3,9 + 8 1/5)×(-6,3) ппжпжжпжпж​

Answer 1

Ответ:

х=2/3

2 задания не решать

Answer 2

To solve this equation and expression, let's break it down step by step:

1. Start with the equation:

   4/15 ÷ x = 2/5

   To solve for x, we can cross-multiply:

   4/15 * 5 = 2 * x

   4/3 = 2 * x

2. Divide both sides by 2 to isolate x:

   (4/3) / 2 = x

   4/6 = x

   Simplify the fraction:

   2/3 = x

Now, we have found the value of x as 2/3.

3. Next, let's simplify the expression:

   (-48 3/8 ÷ 3.9 + 8 1/5) * (-6.3)

   First, simplify the fractions within the mixed numbers:

   • (387/8 ÷ 3.9 + 41/5) * (-6.3)

   Now, let's work with the division and addition inside the parentheses:

   • ((387/8) / 3.9 + (41/5)) * (-6.3)

   • (48.375 / 3.9 + 8.2) * (-6.3)

   • (12.5 + 8.2) * (-6.3)

   Now, add the numbers inside the parentheses:

   • 20.7 * (-6.3)

   Finally, multiply the numbers:

   -130.41

So, the value of the expression is approximately -130.41.

To summarize:

• The value of x in the equation 4/15 ÷ x = 2/5 is x = 2/3.
• The value of the expression (-48 3/8 ÷ 3.9 + 8 1/5) * (-6.3) is approximately -130.41.