Question

Need help. Videos are not explaining how the equation should be done.

Answer 1

`x=5`

Explanation:

we know that

If two figures are congruent, then its corresponding sides and its corresponding angles are congruent

In this problem

Triangles ACB and DCE are congruent

so

Corresponding sides are named using pairs of letters in the same position on either side of the congruence statement

AC≅DC

CB≅CE

AB≅DE

Corresponding angles are named using a letter in the same position on either side of the congruence statement

∠A≅∠D

∠B≅∠E

therefore

∠A=∠D

substitute the given values

`50^o=10x^o`

solve for x

`x=5`