Answer:
No.
Step-by-step explanation:
You are trying to solve for x. Note the equal sign, what you do to one side, you do to the other. Add 4 to both sides of the equation to isolate the variable, x:
-4 + x = 10
-4 (+4) + x = 10 (+4)
x = 10 +4
x = 14
x = 14, x ≠ 13, ∴ 13 is not a solution.
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