Solve for z_6
z_{6}=\frac{y}{7}
Solve for y
y=7z_{6}
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7z_{6}=y
Swap sides so that all variable terms are on the left hand side.
\frac{7z_{6}}{7}=\frac{y}{7}
Divide both sides by 7.
z_{6}=\frac{y}{7}
Dividing by 7 undoes the multiplication by 7.
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