Problem

Tell which value of the variable, if any, is the solution of the equation.
\[
d-(-14)+6 d=0 ;\{-2,2,7,-7\}
\]

Which of the following is the solution of the equation?
A. -2
B. 2
C. 7
D. -7
E. No solution is given in the set of values.

Answer

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Answer

\(\boxed{-2}\)

Steps

Step 1 ：\(d - (-14) + 6d = 0\)

Step 2 ：\(d + 14 + 6d = 0\)

Step 3 ：\(7d + 14 = 0\)

Step 4 ：\(7d = -14\)

Step 5 ：\(d = -\frac{14}{7}\)

Step 6 ：\(d = -2\)

Step 7 ：\(\boxed{-2}\)

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