Solve for j.

3j–5=8+1/2j+1/3j

1 answer

To solve the equation \( 3j - 5 = 8 + \frac{1}{2}j + \frac{1}{3}j \), we first need to combine the terms on the right side.

  1. Combine the \( j \) terms on the right side:

    \[ \frac{1}{2}j + \frac{1}{3}j \]

    To add these fractions, we need a common denominator, which is 6:

    \[ \frac{1}{2}j = \frac{3}{6}j \quad \text{and} \quad \frac{1}{3}j = \frac{2}{6}j \]

    Therefore:

    \[ \frac{1}{2}j + \frac{1}{3}j = \frac{3}{6}j + \frac{2}{6}j = \frac{5}{6}j \]

    Now, we substitute this back into the equation:

    \[ 3j - 5 = 8 + \frac{5}{6}j \]

  2. Move the \( \frac{5}{6}j \) term to the left side by subtracting \( \frac{5}{6}j \) from both sides:

    \[ 3j - \frac{5}{6}j - 5 = 8 \]

  3. To combine \( 3j \) and \( -\frac{5}{6}j \), convert \( 3j \) into sixths:

    \[ 3j = \frac{18}{6}j \]

    Thus:

    \[ \frac{18}{6}j - \frac{5}{6}j = \frac{13}{6}j \]

    Now the equation is:

    \[ \frac{13}{6}j - 5 = 8 \]

  4. Add 5 to both sides to isolate the term with \( j \):

    \[ \frac{13}{6}j = 8 + 5 = 13 \]

  5. Now, solve for \( j \) by multiplying both sides by \( \frac{6}{13} \):

    \[ j = 13 \cdot \frac{6}{13} = 6 \]

Thus, the solution for \( j \) is:

\[ \boxed{6} \]

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