Solve for y
y=\frac{-z-18}{7}
Solve for z
z=-7y-18
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7y+z=-18
Combine 10y and -3y to get 7y.
7y=-18-z
Subtract z from both sides.
7y=-z-18
The equation is in standard form.
\frac{7y}{7}=\frac{-z-18}{7}
Divide both sides by 7.
y=\frac{-z-18}{7}
Dividing by 7 undoes the multiplication by 7.
7y+z=-18
Combine 10y and -3y to get 7y.
z=-18-7y
Subtract 7y from both sides.
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