Solve for x
x=-\frac{2z}{15}+7
Solve for z
z=\frac{105-15x}{2}
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15x=105+1z-3z
Subtract 3z from both sides.
15x=105-2z
Combine 1z and -3z to get -2z.
\frac{15x}{15}=\frac{105-2z}{15}
Divide both sides by 15.
x=\frac{105-2z}{15}
Dividing by 15 undoes the multiplication by 15.
x=-\frac{2z}{15}+7
Divide 105-2z by 15.
15x+3z-z=105
Subtract 1z from both sides.
15x+2z=105
Combine 3z and -z to get 2z.
2z=105-15x
Subtract 15x from both sides.
\frac{2z}{2}=\frac{105-15x}{2}
Divide both sides by 2.
z=\frac{105-15x}{2}
Dividing by 2 undoes the multiplication by 2.
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