Question

Dacă a/b = 5/3,atunci a+5/a-5 este egal cu...

$\frac{a}{b} = \frac{5}{3}$
​

Answer 1

Răspuns:

$\frac{a}{b} =\frac{5}{3} = > a=\frac{5b}{3} \\\\\frac{a+5}{a-5} =\frac{\frac{5b}{3} +5(^{3} }{\frac{5b}{3} -5(^{3} } =\frac{\frac{5b+15}{3} }{\frac{5b-15}{3} } =\frac{5b+15}{3} *\frac{3}{5b-15} =\frac{5b+15}{5b-15} =\frac{5(b+3)}{5(b-3)} =\frac{b+3}{b-3}$