Question

como fazer essa ?x/5 + x/2 = 7/10

Answer 1

Olá Gabrielle !

$\frac{x}{5} + \frac{x}{2} = \frac{7}{10} \\ \\ MMC = 10 \\ \\ \frac{2x}{10} + \frac{5x}{10} = \frac{7}{10} \\ \\ 2x + 5x = 7 \\ 7x = 7 \\ x = \frac{7}{7} \\ x = 1$

Tenha bons estudos !

Answer 2

$\textit{Resolu\c{c}\~ao}\Rightarrow \left\{\begin{matrix} MMC\ de\ 5\ e\ 2=10\\\\ \frac{2x+5x}{10} = \frac{7}{10} \\\\ 7x = \frac{7.10}{10} \\\\ x= \frac{7}{7} \\\\ \boxed{\boxed{x=1}}& \end{matrix}\right.$