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Part 1

In the​ figure, m angle 1 equals left parenthesis 8 x plus 7 right parenthesis degrees​, m angle 2 equals left parenthesis 5 x plus 12 right parenthesis degrees​, and m angle 4 equals left parenthesis 14 x plus 10 right parenthesis degrees. Your friend incorrectly says that mangle4equals57degrees. What is mangle​4? What mistake might your friend have​ made?

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​(This figure is not to​ scale.)

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Part 1

mangle4equal