Solve the Rational Equation: Isolate X in 5/(x-8) = 3/4x

Question

Solve for X:

5x8=34x \frac{5}{x-8}=\frac{3}{4x}

Video Solution

Solution Steps

00:00 Solution
00:03 We want to isolate the unknown X
00:07 Let's multiply by both denominators to eliminate fractions
00:14 Let's properly open parentheses, multiply by each factor
00:20 Let's arrange the equation so that one side has only the unknown X
00:29 Let's isolate the unknown X
00:35 And this is the solution to the problem

Step-by-Step Solution

To solve the equation 5x8=34x \frac{5}{x-8} = \frac{3}{4x} for the variable x x , we will follow these steps:

Step 1: Apply cross-multiplication to the equation. This involves multiplying the numerator of each fraction by the denominator of the other fraction:

54x=3(x8) 5 \cdot 4x = 3 \cdot (x - 8)

Step 2: Simplify both sides of the resulting equation:

20x=3x24 20x = 3x - 24

Step 3: Rearrange the equation to isolate terms involving x x on one side:

20x3x=24 20x - 3x = -24

This simplifies to:

17x=24 17x = -24

Step 4: Solve for x x by dividing both sides of the equation by 17:

x=2417 x = \frac{-24}{17}

Therefore, the solution to the equation is:

x=2417 x = \frac{-24}{17}

Answer

2417 \frac{-24}{17}