a) \( \frac{16}{y-2}-\frac{6}{y}=\frac{21}{y+1} \);
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To solve this equation, we can start by finding a common denominator, which would be \(y(y-2)(y+1)\). Multiplying each term by this denominator will eliminate the fractions: \[ 16y(y + 1) - 6(y - 2)(y + 1) = 21y(y - 2) \] Now, expand each term. After that, combine like terms, simplify, and set the equation to zero. This way, you'll have a quadratic equation that you can solve using factoring or the quadratic formula. Don’t forget to check your solutions to avoid extraneous roots! If you want to verify, substitute your found value of \(y\) back into the original equation to see if both sides equal! Solving equations like these not only builds algebra skills but boosts confidence in handling complex problems.