Simplify each term.

Apply the distributive property.

Multiply by .

Subtract from .

Subtract from both sides of the equation.

Subtract from .

Subtract from both sides of the equation.

Add to both sides of the equation.

Divide each term in by .

Cancel the common factor of .

Cancel the common factor.

Divide by .

Simplify each term.

Dividing two negative values results in a positive value.

Divide by .

Solve for y (z-7)-(y+4)=10y