Question

Please help!

For what value of x must ABCD be a​ parallelogram?

x=?

Answer 1

`x=3`

Explanation:

For a shape to be a parallelogram, the angles that are across from one another have to be equal.

We can now find x by making both equations equal to each other and solving.

`11x+1=13x-5`

Solve.

`11x+1=13x-5\\6=2x\\x=3`