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Formula
Solve the equation
Answer
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$2z+9 = z+1$
$z = - 8$
$ $ Solve a solution to $ z$
$2 z + 9 = \color{#FF6800}{ z } + 1$
$ $ Move the variable to the left-hand side and change the symbol $ $
$2 z + 9 \color{#FF6800}{ - } \color{#FF6800}{ z } = 1$
$2 z \color{#FF6800}{ + } \color{#FF6800}{ 9 } - z = 1$
$ $ Move the constant to the right side and change the sign $ $
$2 z - z = 1 \color{#FF6800}{ - } \color{#FF6800}{ 9 }$
$\color{#FF6800}{ 2 } \color{#FF6800}{ z } \color{#FF6800}{ - } \color{#FF6800}{ z } = 1 - 9$
$ $ Organize the expression $ $
$\color{#FF6800}{ z } = 1 - 9$
$z = \color{#FF6800}{ 1 } \color{#FF6800}{ - } \color{#FF6800}{ 9 }$
$ $ Subtract $ 9 $ from $ 1$
$z = \color{#FF6800}{ - } \color{#FF6800}{ 8 }$
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