Solve for m
m=-\frac{9n}{40}+2
Solve for n
n=\frac{80-40m}{9}
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200m=400-45n
Subtract 45n from both sides.
\frac{200m}{200}=\frac{400-45n}{200}
Divide both sides by 200.
m=\frac{400-45n}{200}
Dividing by 200 undoes the multiplication by 200.
m=-\frac{9n}{40}+2
Divide 400-45n by 200.
45n=400-200m
Subtract 200m from both sides.
\frac{45n}{45}=\frac{400-200m}{45}
Divide both sides by 45.
n=\frac{400-200m}{45}
Dividing by 45 undoes the multiplication by 45.
n=\frac{80-40m}{9}
Divide 400-200m by 45.
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