If p-q - 5-7 and p-q-2 - then find the value of p-q -

pq = 57 7p=5q Therefore, 57q q= 2 27q= 2 q=7 p=5 Therefore, p+q=7+5=12 ...

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Negatives and Reciprocals

If p/q = 5/...

Question

If $\frac{p}{q} = \frac{5}{7}$ and p-q=-2 , then find the value of p+q .

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Solution

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2^{2} \times p \times q \times 7

p

q

p \times q = - 18

p + q = - 7

p = q + 2

p + q = 5

p^{2} - q^{2}

{(\frac{5}{9})}^{- 4} \times {(\frac{7}{5})}^{- 4} = (\frac{p}{q})

{(\frac{p}{q})}^{- 2}

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