Question

pls also give the answer of this

Answer 1

y +angle BFC= 90°
ANGLE BFC=90-Y......( 1)
X+ANGKE BFC=60°
ANGLE BFC=60°-X....(2)
COMPARING( 1 )AND (2)
90-Y =60-X
30+X=Y
NOW Y-2X= 30+X-2X
=30-X