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.
