Answer
The solution is 270
Work Step by Step
-20-(-50)=$\frac{x}{9}$ Simplify
-20 +50=$\frac{x}{9}$
30=$\frac{x}{9}$ Multiply both sides by 9
30$\times$9=$\frac{x}{9}$9
270=x
The solution is 270
Check
-20-(-50)=$\frac{x}{9}$ Replace x with 270
-20-(-50)=$\frac{270}{9}$ Simplify
-20+50= 30
30=30