The Question is in the file below. (Khan Academy)

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asked May 24, 2017 224k views

1 Answer

SESN · Answer 1 · 2017-05-30T02:59:25+0000

that little squaer angle means right angle or 90 degrees

the black line and the red line cross

therefor the oposte angles are eqal measure
7x=90+x
solve
minus x
6x=90
divide 6
x=15

x=15

The Question is in the file below. (Khan Academy)

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