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!

step-by-step explanation:

*calories burned = (weight)(calorie factor)*

calories burned = 180 (0.65)

calories burned = 117

the calories he used up is 117, which is 65% of his weight.