Question

a fraction is equivalent to 4/5 and the sum of its numerator and denominator is 63. the fraction is ________

Answer 1

$Let \: the \: Number \: be \: X and \: Y$

$\frac{x + 4}{y + 5} = 63$

$x + 4 = 63(y + 5)$

$x + 4 = 63y + 315$

$x - 63y = 315 - 4$

$x - 63y = 311$

$x = 311 + 63y$