Solve for x
x=\frac{7z}{3}-0.12
Solve for z
z=\frac{3x}{7}+\frac{9}{175}
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-3x+0.04=0.4-7z
Subtract 7z from both sides.
-3x=0.4-7z-0.04
Subtract 0.04 from both sides.
-3x=0.36-7z
Subtract 0.04 from 0.4 to get 0.36.
\frac{-3x}{-3}=\frac{0.36-7z}{-3}
Divide both sides by -3.
x=\frac{0.36-7z}{-3}
Dividing by -3 undoes the multiplication by -3.
x=\frac{7z}{3}-\frac{3}{25}
Divide 0.36-7z by -3.
7z+0.04=0.4+3x
Add 3x to both sides.
7z=0.4+3x-0.04
Subtract 0.04 from both sides.
7z=0.36+3x
Subtract 0.04 from 0.4 to get 0.36.
7z=3x+0.36
The equation is in standard form.
\frac{7z}{7}=\frac{3x+0.36}{7}
Divide both sides by 7.
z=\frac{3x+0.36}{7}
Dividing by 7 undoes the multiplication by 7.
z=\frac{3x}{7}+\frac{9}{175}
Divide 0.36+3x by 7.
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