doubt in one step....

Question

plz tell how did u get 3x/2 in the 2nd step

Answer 1

?????????????????? "measure av angel" ???????????????

????? yu wanna no HOW BIG ???????????

angel=(komplement/2)-30

komplement=90-angel

angel=[(90-angel)/2] -30....=45 -30 -(angel/2)

1.5*angel=45-30=15

angel=15/1.5=10

Answer 2

x= 30deg +(90 -x)/2  open up the ( ), x=30+45-x/2, add x/2 to both sides,x+x/2=75, (1+1/2)x=75, 3/2x=75

(3/2)x=30+45=75

x=(2/3)*75=150/3

=50

....[(90-x)=40]/2=20

30+20=50