Question

Identify the plane parallel to plane BCD.

O plane ABF
plane DEF
O plane AEF
O plane ABE

Answer 1

`x = 20`

Explanation:

The question is different from the attachment.

The question itself can not be solved without the right attachment.

So, my answer will be based on the attachment

Given

`m_3 = 5x + 10`

`m_5 = 3x + 10`

Required

Find x

m3 and m5 are supplementary. The relationship between than can be written as:

`m_3 + m_5 = 180`

This gives

`5x + 10 + 3x + 10 = 180`

Collect Like Terms

`5x + 3x = 180 - 10 -10`

`8x = 160`

Solve for x

`x = 160/8`

`x = 20`