Tell whether the given number is a solution of the equation. $5 k + 7 = 7 k - 1$ ; $k = 5$
A) unqualified solution
B) removed solution
C) solution
D) not a solution
E) none of these

Question

Tell whether the given number is a solution of the equation. $5 k + 7 = 7 k - 1$ ; $k = 5$
A) unqualified solution
B) removed solution
C) solution
D) not a solution
E) none of these

Quizplus · Accepted Answer

Substituting $k = 5$ into the equation $5k + 7 = 7k - 1$, we get $5(5) + 7 = 7(5) - 1$, which simplifies to $25 + 7 = 35 - 1$. This further simplifies to $32 \neq 34$, indicating that $k = 5$ does not satisfy the equation. Therefore, $k = 5$ is not a solution.

Tell Whether the Given Number Is a Solution of the Equation