Resposta :
[tex]\large\displaystyle\text{$\mathtt{ 2x+10=20}$}[/tex]
[tex]\large\displaystyle\text{$\mathtt{ 2x=20-10}$}[/tex]
[tex]\large\displaystyle\text{$\mathtt{2x=10 }$}[/tex]
[tex]\large\displaystyle\text{$\mathtt{x=\dfrac{10}{2} }$}[/tex]
[tex]\large\displaystyle\text{$\boxed{\boxed{\mathtt{ x=5}}}$}[/tex]
Resposta:
5
Explicação passo a passo:
[tex]2*x+10=20\\\\2*x=20-10\\\\2*x=10\\\\x=\frac{10}{2}\\ \\x=5[/tex]