Solve for k
k=-\frac{3s}{4}+6.9
Solve for s
s=-\frac{4k}{3}+9.2
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12k=82.8-9s
Subtract 9s from both sides.
\frac{12k}{12}=\frac{82.8-9s}{12}
Divide both sides by 12.
k=\frac{82.8-9s}{12}
Dividing by 12 undoes the multiplication by 12.
k=-\frac{3s}{4}+\frac{69}{10}
Divide 82.8-9s by 12.
9s=82.8-12k
Subtract 12k from both sides.
\frac{9s}{9}=\frac{82.8-12k}{9}
Divide both sides by 9.
s=\frac{82.8-12k}{9}
Dividing by 9 undoes the multiplication by 9.
s=-\frac{4k}{3}+\frac{46}{5}
Divide 82.8-12k by 9.
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