Solve for y 7-y-y=-1

$7 - y - y = - 1$

Step 1

Subtract $y$ from $- y$ .

$7 - 2 y = - 1$

Step 2

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

Subtract $7$ from both sides of the equation.

$- 2 y = - 1 - 7$

Subtract $7$ from $- 1$ .

$- 2 y = - 8$

Step 3

Divide each term in $- 2 y = - 8$ by $- 2$ and simplify.

Divide each term in $- 2 y = - 8$ by $- 2$ .

$\frac{- 2 y}{- 2} = \frac{- 8}{- 2}$

Simplify the left side.

Cancel the common factor of $- 2$ .

Cancel the common factor.

$\frac{- 2 y}{- 2} = \frac{- 8}{- 2}$

Divide $y$ by $1$ .

$y = \frac{- 8}{- 2}$

Simplify the right side.

Divide $- 8$ by $- 2$ .

$y = 4$