Question

Calcule e simplifique 7x/4 : 3x/x+3

Answer 1

Resposta:

$\frac{7x}{4} :\frac{3x}{x+3} \\ \\ divisao~de~fracoes:~~mantenha~uma~fracao~inalterada\\ e~multiplique~pelo~inverso~da~outra\\ \\ \frac{7x}{4} :\frac{3x}{x+3}=\frac{7x}{4}~.~\frac{x+3}{3x} =$

$\frac{7x.(x+3)}{4.3x} =\frac{7x^{2}+21x }{12x} =\frac{7x.(x+3)}{12x} =\frac{7.(x+3)}{12} =\frac{7x+21}{12}$

Resposta:       $\frac{7x+21}{12}$