Answer
The solution is 15
Work Step by Step
-9 +20 =19x -4 - 18x Simplify both sides
11 = x -4 Add 4 to both sides
11+4=x-4+4 Simplify
15=x
The solution is 15
Check
-9 +20 =19x -4 - 18x
-9+20 =19$\times$ 15- 4 - 18$\times$ 15
11 = 295 -4 -280 Simplify
11=11