Solve by Addition/Elimination y=x-1 2x-y=0

$y = x - 1$ $2 x - y = 0$

Move all terms containing variables to the left side of the equation.

Subtract $x$ from both sides of the equation.

$y - x = - 1$

$2 x - y = 0$

Reorder $y$ and $- x$ .

$- x + y = - 1$

$2 x - y = 0$

$- x + y = - 1$

$2 x - y = 0$

Add the two equations together to eliminate $y$ from the system.

Substitute the value found for $x$ into one of the original equations, then solve for $y$ .

Substitute the value found for $x$ into one of the original equations to solve for $y$ .

$- (- 1) + y = - 1$

Multiply $- 1$ by $- 1$ .

$1 + y = - 1$

Move all terms not containing $y$ to the right side of the equation.

Subtract $1$ from both sides of the equation.

$y = - 1 - 1$

Subtract $1$ from $- 1$ .

$y = - 2$

The solution to the independent system of equations can be represented as a point.

$(- 1, - 2)$

The result can be shown in multiple forms.

Point Form:

$(- 1, - 2)$

Equation Form:

$x = - 1, y = - 2$