Question
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Solve for \( y \). \[ \frac{1}{y-4}+\frac{2}{y+3}=\frac{10}{y^{2}-y-12} \] If there is more than one solution, separate them with commas. If there is no solution, dick on "No solution". \( y=\square \)

Ask by Clark May. in the United States
Feb 04,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

\( y = 5 \)

Solution

To solve the equation: \[ \frac{1}{y-4} + \frac{2}{y+3} = \frac{10}{y^{2} - y - 12} \] **Step 1:** Factor the denominator on the right side. \[ y^{2} - y - 12 = (y - 4)(y + 3) \] **Step 2:** Rewrite the equation with the factored denominator. \[ \frac{1}{y-4} + \frac{2}{y+3} = \frac{10}{(y-4)(y+3)} \] **Step 3:** Multiply both sides by \((y - 4)(y + 3)\) to eliminate the denominators. \[ (y + 3) + 2(y - 4) = 10 \] **Step 4:** Distribute and combine like terms. \[ y + 3 + 2y - 8 = 10 \] \[ 3y - 5 = 10 \] **Step 5:** Solve for \( y \). \[ 3y = 15 \] \[ y = 5 \] **Step 6:** Check for any restrictions. The original denominators \( y - 4 \) and \( y + 3 \) cannot be zero. \[ y \neq 4 \quad \text{and} \quad y \neq -3 \] Since \( y = 5 \) does not violate these restrictions, it is the valid solution. \[ y = 5 \]

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Extra Insights

To solve for \( y \), we first notice that the denominator on the right side, \( y^2 - y - 12 \), can be factored as \( (y-4)(y+3) \). We start with the equation: \[ \frac{1}{y-4} + \frac{2}{y+3} = \frac{10}{(y-4)(y+3)} \] Next, we can multiply each term by \( (y-4)(y+3) \) to eliminate the fractions: \[ (y+3) + 2(y-4) = 10 \] Simplifying the left-hand side gives: \[ y + 3 + 2y - 8 = 10 \] \[ 3y - 5 = 10 \] \[ 3y = 15 \] \[ y = 5 \] Now, we should check if this solution does not make any denominator zero: - \( y - 4 = 5 - 4 = 1 \) (not zero) - \( y + 3 = 5 + 3 = 8 \) (not zero) The solution \( y = 5 \) is valid. Therefore, the final answer is: \( y = 5 \)

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