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7 4 3y 1

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7=-4/3y -1

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Answer to a math question 7=-4/3y -1

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$\begin{array} { l }7=-\frac{ 4 }{ 3y-1 },& y≠\frac{ 1 }{ 3 }\end{array}$

$7\left( 3y-1 \right)=-4$

$21y-7=-4$

$21y=-4+7$

$21y=3$

$\begin{array} { l }y=\frac{ 1 }{ 7 },& y≠\frac{ 1 }{ 3 }\end{array}$

$\begin{align*}&y=\frac{ 1 }{ 7 } \\&\begin{array} { l }y=0.\overline{ 142857 },& y={7}^{-1}\end{array}\end{align*}$

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