Solve for y
y=20-2z
Solve for x (complex solution)
x\in \mathrm{C}
y=20-2z
Solve for x
x\in \mathrm{R}
y=20-2z
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0x+5y+10z=100
Multiply 0 and 5 to get 0.
0+5y+10z=100
Anything times zero gives zero.
5y+10z=100
Anything plus zero gives itself.
5y=100-10z
Subtract 10z from both sides.
\frac{5y}{5}=\frac{100-10z}{5}
Divide both sides by 5.
y=\frac{100-10z}{5}
Dividing by 5 undoes the multiplication by 5.
y=20-2z
Divide 100-10z by 5.
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