Solve for x
x=100-z-y
Solve for y
y=100-z-x
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3x+3z=300-3y
Subtract 3y from both sides.
3x=300-3y-3z
Subtract 3z from both sides.
3x=300-3z-3y
The equation is in standard form.
\frac{3x}{3}=\frac{300-3z-3y}{3}
Divide both sides by 3.
x=\frac{300-3z-3y}{3}
Dividing by 3 undoes the multiplication by 3.
x=100-z-y
Divide 300-3y-3z by 3.
3y+3z=300-3x
Subtract 3x from both sides.
3y=300-3x-3z
Subtract 3z from both sides.
3y=300-3z-3x
The equation is in standard form.
\frac{3y}{3}=\frac{300-3z-3x}{3}
Divide both sides by 3.
y=\frac{300-3z-3x}{3}
Dividing by 3 undoes the multiplication by 3.
y=100-z-x
Divide 300-3x-3z by 3.
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