Question

Use substitution to determine which of the following is a solution for x in the equation:

Answer 1

Answer:

x = 6

Step-by-step explanation:

x+4−4=10−4

x=6

Answer 2

Answer:

x = 6

Step-by-step explanation:

The easier method to do this is to just subtract 4 from both sides, like so:

x + 4 = 10

  - 4    - 4

________

x = 6

However, since it' asking for the substitution method, we plug in the x-values to see if they come out to a sum of 10:

x + 4 = 10

A. 14 + 4 = 10        

          18 = 10                                   Does not match

B. 4 + 4 = 10                          

          8 = 10                                    Does not match

C. 6 + 4 = 10                

         10 = 10                                    Matches

D. 8 + 4 = 10                    

         12 = 10                                    Does not match

So this means, x = 6 is the final answer.