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Formula
Solve the equation
$$2 x - 1 = 0$$
$x = \dfrac { 1 } { 2 }$
 Solve a solution to $x$
$2 x \color{#FF6800}{ - } \color{#FF6800}{ 1 } = 0$
 Move the constant to the right side and change the sign 
$2 x = \color{#FF6800}{ 1 }$
$\color{#FF6800}{ 2 } \color{#FF6800}{ x } = \color{#FF6800}{ 1 }$
 Divide both sides by the same number 
$\color{#FF6800}{ x } = \color{#FF6800}{ \dfrac { 1 } { 2 } }$