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x+x=10y
Multiply both sides of the equation by y.
2x=10y
Combine x and x to get 2x.
\frac{2x}{2}=\frac{10y}{2}
Divide both sides by 2.
x=\frac{10y}{2}
Dividing by 2 undoes the multiplication by 2.
x=5y
Divide 10y by 2.
x+x=10y
Variable y cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by y.
2x=10y
Combine x and x to get 2x.
10y=2x
Swap sides so that all variable terms are on the left hand side.
\frac{10y}{10}=\frac{2x}{10}
Divide both sides by 10.
y=\frac{2x}{10}
Dividing by 10 undoes the multiplication by 10.
y=\frac{x}{5}
Divide 2x by 10.
y=\frac{x}{5}\text{, }y\neq 0
Variable y cannot be equal to 0.