Find angle x, in degrees.
Since DBA is a straight line ---> 7y + 5y = 180 ---> 12y = 180 ---> y = 15
Since 3y + 5y + x = 180 ---> 3(15) + 5(15) + x = 180 ---> x = 60
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\(7y+5y=180^o\\ y=15^o\\ x=180^o-(5+3)\cdot 15^o\)
\(x=60^o\)
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