Question

Resolva a equação sete x mais três que é igual a quarentena e nove x.

Answer 1

$\large\boxed{\begin{array}{l}\rm Resolva\,a\,equac_{\!\!,}\tilde ao\,7x+3=49x\,sendo\,U=\mathbb{R}.\\\underline{\boldsymbol{soluc_{\!\!,}\tilde ao\!:}}\\\sf 7x+3=49x\\\sf 49x=7x+3\\\sf 49x-7x=3\\\sf 42x=3\\\\\sf x=\dfrac{3\div3}{42\div3}\\\\\sf x=\dfrac{1}{14}\end{array}}$