Combine like terms to simplify the following expression x + -x

The triangles are similar. what is the value of x? show your work.

In the figure below, segment ac is congruent to segment ab: triangle abc with a segment joining vertex a to point d on side bc. side ab is congruent to side ac which statement is used to prove that angle abd is congruent to angle acd? segment ad bisects angle cab. triangle acd is similar to triangle abd. segment ad is congruent to segment ac. angle cab is congruent to angle cba.

Which table represents a linear function? i'll give brainliest to first answer ^'^