Question

Elabore duas situações problemas que envolvam um valor desconhecido e diga qual
equação as representa. Resolva as equações.​

Answer 1

$\large\boxed{\begin{array}{l}\rm Mestre\,Splinter\,gasta\,\dfrac{1}{5}\,do\,sal\acute ario\,com\,moradia,\\\rm \dfrac{2}{3}\,com\,alimentac_{\!\!,}\tilde ao\,e\,lhe\,sobram\,4000.\\\rm Qual\,o\,sal\acute ario\,de\, Mestre\,Splinter?\\\underline{\sf soluc_{\!\!,}\tilde ao}\\\rm seja\,x\,o\,sal\acute ario\,do\,Mestre\,Splinter.\\\rm \dfrac{1}{5}x+\dfrac{2}{3}x+4000=x\bullet(15)\\\\\rm 3x+10x+60\,000=15x\\\rm 15x-3x-10x=60\,000\\\rm2x=60\,000\\\rm x=\dfrac{60\,000}{2}\\\\\rm\,x=30\,000\end{array}}$

$\large\boxed{\begin{array}{l}\rm o\,dobro\,de\,um\,n\acute umero\,\acute e\,igual\,a\,10.\\\rm quanto\,vale\,esse\,n\acute umero?\\\rm 2x=10\\\rm x=\dfrac{10}{2}\\\\\rm x=5\end{array}}$