Question

2x+5x+14=56


A)5
B)6
C)7
D)4

Answer 1

$\Large\boxed{\begin{array}{l}\rm O\,valor\,de\,x\,na\,equac_{\!\!,}\tilde ao~2x+5x+14=56\\\rm sendo~U=\mathbb{R}~\acute e:\\\rm A)5\\\rm B)6\\\rm C)7\\\rm D)4\\\underline{\boldsymbol{soluc_{\!\!,}\tilde ao\!:}}\\\sf 2x+5x+14=56\\\sf 7x=56-14\\\sf 7x=42\\\sf x=\dfrac{42}{7}\\\\\sf x=6\\\huge\boxed{\boxed{\boxed{\boxed{\sf\red{\maltese}\blue{~alternativa~B}}}}}\green{\checkmark}\end{array}}$