Question

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Add these expressions
(3x+15) + (4x+13)

Answer 1

Answer:7x+28

Step-by-step explanation:

Answer 2

Answer:

7x + 28

Step-by-step explanation:

Line up the columns just like with standard addition.  Keep the x numbers in the same columns and keep the integers in their columns.  It will look like this:

               3x     +     15

PLUS       4x     +     13

              ----------------------

                7x     +     28