Tan20.5*3=x(tan27.8-tan20.5)

(Tan(20.5)*3)/(tan(27.8)-tan(20.5))=x

x=7.3140772301491126

Solve for x:
1.12165=0.153356 x

 

1.12165=0.153356 x is equivalent to 0.153356 x=1.12165:
0.153356 x=1.12165

 

Divide both sides of 0.153356 x=1.12165 by 0.153356:
(0.153356 x)/0.153356=1.12165/0.153356

 

0.153356/0.153356=1:
x=1.12165/0.153356

 

1.12165/0.153356 = 7.31408:
Answer: |  x=7.31408