Last one!

Solve for h.
h- (-3)=9

Hello.

To solve this, isolate h, by adding the two numbers.

9 + (-3) = 6

h = 6

Check: 6 - (-3) = 9

This is true because when subtracting a negative number, it cancels out because of double negative, so it becomes 6 + 3 = 9, which is also true.