From the figure,
(19x+3) =( 11x-2) + (9x+1)______{ exterior angle of a triangle is equal
to the sum of 2 opposite interior angles}
now,
19x+3 = 11x-2 + 9x+1
19x-20x = -2+1-3
-x = - 4
therefore,
X = 4.
if you want to find the value of angles ,
just put 4 Inthe place of X.
and do ..
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.Do you know a Unkn_____