Resposta :
Resposta:
[tex]\frac{1}{4}*\frac{1}{3} =\frac{x}{12} \\\\\frac{x}{4}+\frac{x}{3} = \frac{7}{y} \\\\ \frac{7}{y}+\frac{x}{12} =\frac{7}{12}[/tex]
Resposta:
[tex]\frac{1}{4}*\frac{1}{3} =\frac{x}{12} \\\\\frac{x}{4}+\frac{x}{3} = \frac{7}{y} \\\\ \frac{7}{y}+\frac{x}{12} =\frac{7}{12}[/tex]