-5 could not be used in the table again, because we have the value of x=-5 for the value of 15. Therefore correct option is C.
Answer: C. -5
<h3><u>The value of x is equal to 3.</u></h3>
39 - 5x = 8x
<em><u>Add 5x to both sides.</u></em>
39 = 13x
<em><u>Divide both sides by 13.</u></em>
x = 3
The answer is (A) SSS. The triangles share one side and it is indicated that the other two are congruent.
Answer I b because we do not care