Move all terms not containing y to the right side of the equation.
Add 13 to both sides of the equation.
Add -103 and 13.
Divide each term by -9 and simplify.
Divide each term in -9y=-90 by -9.
Cancel the common factor of -9.
Cancel the common factor.
Divide y by 1.
Divide -90 by -9.
Solve for y -9y-13=-103