Solve for a (complex solution)
\left\{\begin{matrix}a=-\frac{9-7x}{y}\text{, }&y\neq 0\\a\in \mathrm{C}\text{, }&x=\frac{9}{7}\text{ and }y=0\end{matrix}\right.
Solve for a
\left\{\begin{matrix}a=-\frac{9-7x}{y}\text{, }&y\neq 0\\a\in \mathrm{R}\text{, }&x=\frac{9}{7}\text{ and }y=0\end{matrix}\right.
Solve for x
x=\frac{ay+9}{7}
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ya=7x-9
The equation is in standard form.
\frac{ya}{y}=\frac{7x-9}{y}
Divide both sides by y.
a=\frac{7x-9}{y}
Dividing by y undoes the multiplication by y.
ya=7x-9
The equation is in standard form.
\frac{ya}{y}=\frac{7x-9}{y}
Divide both sides by y.
a=\frac{7x-9}{y}
Dividing by y undoes the multiplication by y.
7x-9=ay
Swap sides so that all variable terms are on the left hand side.
7x=ay+9
Add 9 to both sides.
\frac{7x}{7}=\frac{ay+9}{7}
Divide both sides by 7.
x=\frac{ay+9}{7}
Dividing by 7 undoes the multiplication by 7.
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