You have the following equation:
35 + 3x - 11 = 23
In order to solve the previous equation for x, proceed as follow:
35 + 3x - 11 = 23 order terms left side
35 - 11 + 3x = 23 simplify like terms 35 and -11
24 + 3x = 23 subtract 24 both sides
3x = 23 - 24
3x = -1 divide by 3 both sides
x = -1/3
x ≈ -0.33
Hence, the solution for x is approximately -0.33