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Formula
Solve the equation
Graph
$y = 4 + \dfrac { 2 } { 5 } x$
$y = 13$
$x$Intercept
$\left ( - 10 , 0 \right )$
$y$Intercept
$\left ( 0 , 4 \right )$
$4+ \dfrac{ 2 }{ 5 } x = 13$
$x = \dfrac { 45 } { 2 }$
 Solve a solution to $x$
$4 + \color{#FF6800}{ \dfrac { 2 } { 5 } } \color{#FF6800}{ x } = 13$
 Calculate the multiplication expression 
$4 + \color{#FF6800}{ \dfrac { 2 x } { 5 } } = 13$
$\color{#FF6800}{ 4 } \color{#FF6800}{ + } \color{#FF6800}{ \dfrac { 2 x } { 5 } } = \color{#FF6800}{ 13 }$
 Multiply both sides by the least common multiple for the denominators to eliminate the fraction 
$\color{#FF6800}{ 20 } \color{#FF6800}{ + } \color{#FF6800}{ 2 } \color{#FF6800}{ x } = \color{#FF6800}{ 65 }$
$\color{#FF6800}{ 20 } + 2 x = 65$
 Move the constant to the right side and change the sign 
$2 x = 65 \color{#FF6800}{ - } \color{#FF6800}{ 20 }$
$2 x = \color{#FF6800}{ 65 } \color{#FF6800}{ - } \color{#FF6800}{ 20 }$
 Subtract $20$ from $65$
$2 x = \color{#FF6800}{ 45 }$
$\color{#FF6800}{ 2 } \color{#FF6800}{ x } = \color{#FF6800}{ 45 }$
 Divide both sides by the same number 
$\color{#FF6800}{ x } = \color{#FF6800}{ \dfrac { 45 } { 2 } }$
 그래프 보기 
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