How to solve y in - (y+9) = 10

Step-by-step explanation:

- (y+9) = 10

Multiply through by - 1 gives us

y+9 = - 10

Subtract 9 from both sides

y = - 19

That's your answer.

If you work it through it satisfies the equation.

That is:

- (-19 + 9) = 10

- (-10) = 10

10 = 10

Boo ya!