Solve for m
m=\frac{z+1}{3}
Solve for z
z=3m-1
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45m=15+15z
Add 15z to both sides.
45m=15z+15
The equation is in standard form.
\frac{45m}{45}=\frac{15z+15}{45}
Divide both sides by 45.
m=\frac{15z+15}{45}
Dividing by 45 undoes the multiplication by 45.
m=\frac{z+1}{3}
Divide 15+15z by 45.
-15z=15-45m
Subtract 45m from both sides.
\frac{-15z}{-15}=\frac{15-45m}{-15}
Divide both sides by -15.
z=\frac{15-45m}{-15}
Dividing by -15 undoes the multiplication by -15.
z=3m-1
Divide 15-45m by -15.
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