I need help with my answer

Question

Find x + 21

Find 5x-27

Find x

Answer 1

"Vertex" angles when two lines intersect are equal. So, x+21 = 5x - 27

Grouping terms: 4x = 48 and x = 12

Angles are equal from our calculation. Plug into either expression: 12+21 = 33

Check other expression 5(12)-27 = 33

Good to go!

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