Question

solve:5/(x + y) + 2/(x - y) =3
15/(x + y) + 1/(x - y) = - 1​

Answer 1

$let \: x + y \: be \: a$

$let \: x - y \: be \: b$

$so \:( \frac{a}{5} ) + (\frac{b}{2}) = 3$

$a + b = 30 \: eq1$

$similarly \\ \frac{a}{15} + \frac{b}{1} = - 1$

$a + b = - 15 \: eq2$

$do \: elimimtion \: method \\ after \: doing \: sbstitute$

$x + y = a \\ x - y = b$

then start proceding

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Answer 2

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