[tex]\large\displaystyle\text{$ \mathtt{ 2x+10=300 } $}[/tex]
[tex]\large\displaystyle\text{$ \mathtt{ 2x=300-10 } $}[/tex]
[tex]\large\displaystyle\text{$ \mathtt{ 2x=290 } $}[/tex]
[tex]\large\displaystyle\text{$ \mathtt{ x=\dfrac{290}{2} } $}[/tex]
[tex]\large\displaystyle\text{$ \boxed{\mathtt{x=145} } $}[/tex]
