Question

Solve the equation. $$-9-(-a)=-2$$

Short answer

The solution to the equation \(-9-(-a)=-2\) is \(a = 7\).

Step-by-step solution

Simplification

The equation given is \(-9-(-a)=-2\). The first step is to simplify. When you see -- in a math equation, it can be simplified to '+'. So, \(-9-(-a)\) simplifies to \(-9+a\). So the equation now is \(-9 + a = -2\).

Isolate variable a

To isolate \(a\), add 9 to both sides of the equation. This will give \(a = -2 + 9\).

Solve for a

Summing \(-2\) and \(9\) gives \(7\), so the solution to the equation is \(a = 7\).