Question

$1) frac{ x^{2} -9x}{x+3} = frac{36}{x+3} ; 5) 2) frac{ x^{2} +x}{ x^{2} -25} = frac{15-3x}{ x^{2} -25} ; 3) frac{5x+8}{x-1} = frac{14x+12}{3x+15} ; 4) frac{1}{x-4} - frac{1}{x+6} = frac{5}{28}.$