Resposta :
[tex]x+\frac{7}{5}=\frac{7x}{5} \\
\\
5x+7=7x \\
\\
2x=7 \\
\\
x=\frac{7}{2} [/tex]
Testando:
[tex]\frac{7}{2}.\frac{7}{5}=\frac{49}{10} \\ \\ \frac{7}{2}+\frac{7}{5}=\frac{35+14}{10}=\frac{49}{10}[/tex]
Testando:
[tex]\frac{7}{2}.\frac{7}{5}=\frac{49}{10} \\ \\ \frac{7}{2}+\frac{7}{5}=\frac{35+14}{10}=\frac{49}{10}[/tex]