Question

7/х+4=21/60, 7 разделить на х+4

Answer 1

7/x+4=21/60
Приводим к общему знаменателю, дополнительные множителе к первой дроби 60, к второй x+4
420=21x+84
-21x=84-420
-21x=-336
x=16

Answer 2

To solve this equation, we need to isolate the variable on one side of the equation. Here's how we can do it:

1. Multiply both sides of the equation by 60 to eliminate the denominator on the right-hand side:

   60 * (7/ (x + 4)) + 60 * (4) = 21

2. Simplify the left-hand side by multiplying:

   420 / (x + 4) + 240 = 21

3. Subtract 240 from both sides of the equation:

   420 / (x + 4) = -219

4. Multiply both sides of the equation by (x + 4):

   420 = -219 * (x + 4)

5. Divide both sides of the equation by -219:

   x + 4 = -420 / 219

6. Subtract 4 from both sides of the equation:

   x = (-420 / 219) - 4

   This is the final answer, expressed as a fraction in simplest form or as a decimal rounded to a certain number of decimal places.