Resposta :
[tex]\Huge \text {$ \sf 3x+2=20 \dfrac {} {}$}\\\Huge \text {$ \sf 3x = 20 - 2 \dfrac {} {}$}\\\Huge \text {$ \sf 3x = 18 \dfrac {} {}$}\\\Huge \text {$ \sf x = \dfrac {18} {3}$}\\\Huge \text {$ \sf x = 6 \dfrac {} {}$}[/tex]
[tex]\Huge \text {$ \sf 3x+2=20 \dfrac {} {}$}\\\Huge \text {$ \sf 3x = 20 - 2 \dfrac {} {}$}\\\Huge \text {$ \sf 3x = 18 \dfrac {} {}$}\\\Huge \text {$ \sf x = \dfrac {18} {3}$}\\\Huge \text {$ \sf x = 6 \dfrac {} {}$}[/tex]