### Home > MC1 > Chapter 4 > Lesson 4.3.4 > Problem4-123

4-123.

Remember that the expression for part (a) is x + 1 + x.
If you put in the value for x and simplified the expression, what answer would you get?

${4\frac{1}{2}+1+4\frac{1}{2}=10}$

Look back at part (b) of 4-122. Using the expression you wrote, substitute 4 for ''m'' and simplify the expression.

This problem is very similar to parts (a) and (b). If you are having trouble, refer to those problems.