Question

me ajudem!!!!!!!!!!!

 1/12+1/x=1/5

Answer 1

Olá,

tire o MMC de 5 e 12:

$\dfrac{1}{12}+ \dfrac{1}{x}= \dfrac{1}{5}\\\\ \dfrac{1}{x}= \dfrac{1}{5}- \dfrac{1}{12}\\\\ \dfrac{1}{x}= \dfrac{1\cdot12-1\cdot5}{5\cdot12}\\\\ \dfrac{1}{x}= \dfrac{12-5}{60}\\\\ \dfrac{1}{x}= \dfrac{7}{60}\\\\ 7\cdot x=1\cdot60\\ 7x=60\\\\ \Large\boxed{x= \dfrac{60}{7}~~~~ou~~~~56 \dfrac{4}{7}}$

Tenha ótimos estudos ;))