Question

Se o triplo do número de canetas que eu possuio adiciorna 2 determina 23 quantas canetas tenho

Answer 1

3x +2 = 23

3x = 23-2

3x = 21

x = 21/3

x 7

resposta
tenho 7 canetas

Answer 2

$\Large\displaystyle\begin{gathered} \sf{3x+2=23 } \end{gathered}$

$\Large\displaystyle\begin{gathered} \sf{3x=23-2 } \end{gathered}$

$\Large\displaystyle\begin{gathered} \sf{ 3x=21} \end{gathered}$

$\Large\displaystyle\text{ \begin{gathered} \sf{ x=\frac{21}{3}} \end{gathered} }$

$\Large\displaystyle\begin{gathered} \sf{ x=7\,\checkmark} \end{gathered}$