Solve for x
x=\frac{5z}{4}-37.5
Solve for z
z=\frac{4x}{5}+30
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-0.8x=30-z
Subtract z from both sides.
\frac{-0.8x}{-0.8}=\frac{30-z}{-0.8}
Divide both sides of the equation by -0.8, which is the same as multiplying both sides by the reciprocal of the fraction.
x=\frac{30-z}{-0.8}
Dividing by -0.8 undoes the multiplication by -0.8.
x=\frac{5z}{4}-\frac{75}{2}
Divide 30-z by -0.8 by multiplying 30-z by the reciprocal of -0.8.
z=30+0.8x
Add 0.8x to both sides.
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