5

x+8

=
2
5x−6

1 answer

To solve the equation

\[ \frac{x + 8}{5} = \frac{2}{5x - 6}, \]

we can start by cross-multiplying to eliminate the fractions:

\[ (x + 8)(5x - 6) = 2 \cdot 5. \]

Expanding both sides, we get:

\[ x(5x - 6) + 8(5x - 6) = 10. \]

This simplifies to:

\[ 5x^2 - 6x + 40x - 48 = 10. \]

Combining like terms gives:

\[ 5x^2 + 34x - 48 = 10. \]

Now, we can move \(10\) to the left side:

\[ 5x^2 + 34x - 58 = 0. \]

Now, we can use the quadratic formula \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\), where \(a = 5\), \(b = 34\), and \(c = -58\).

First, we need to calculate the discriminant:

\[ b^2 - 4ac = 34^2 - 4 \cdot 5 \cdot (-58). \]

Calculating this gives:

\[ 1156 + 1160 = 2316. \]

Now, applying the quadratic formula:

\[ x = \frac{-34 \pm \sqrt{2316}}{2 \cdot 5}. \]

Calculating \(\sqrt{2316}\):

\[ \sqrt{2316} \approx 48.12. \]

So we have:

\[ x = \frac{-34 \pm 48.12}{10}. \]

This gives us two potential solutions:

  1. \(x = \frac{-34 + 48.12}{10} \approx \frac{14.12}{10} \approx 1.412\).
  2. \(x = \frac{-34 - 48.12}{10} \approx \frac{-82.12}{10} \approx -8.212\).

Thus, the solutions to the equation are approximately:

\[ x \approx 1.412 \quad \text{and} \quad x \approx -8.212. \]