how can I solve this with all the work because I don't understand this?

To solve this equation, we need to get the variable x to one side of the equation and the constants (other numbers) to the other side of the equation.
11 + 2x + x = 23
First, we must add together the two variable terms on the left side of the equation to simplify, as modeled below:
11 + 2x + x = 23
3x + 11 = 23
Next, we want to cancel out the 11 on the left side of the equation, so we are going to subtract 11 from both sides of the equation.
3x + 11 - 11 = 23 - 11
3x = 12
Finally, we should divide both sides of the equation by 3 so that we can get the variable x completely alone on the left side of the equation and get rid of its coefficient.
3x/3 = 12/3
x = 4
Therefore, your answer is x=4.
Hope this helps!
To get your answer, you need to know how to get x by itslef.
Do not add or multiply 11 to 2x and x because 2x + x is not in parentheses. Instead, add 2x and x because they are the same variable.
2x + x is basically 2x + 1x because x is 1 of x.
You will get 3x. So the equation will look like this: 11 + 3x =23
Next, you need to subtract 11 from both sides. 11 will cancel out on the left side and on the right, it will become 12.
Equation so far: 3x = 12. Now you need to divide 3 from both sides. You will divide because you need to get x by itself. 3x divided by 3 = x because the 3 cancels out. And 12 divided by 3 = 4.
Your answer will be x = 4. To check it, you need to plug 4 (which is x) into the original equation 11+2(4)+(4) = 23