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√3=(2√3+3)x-3√3-5
x(2√3+3)=√3+3√3+5
x(2√3+3)=4√3+5
x=(4√3+5)(2√3-3) /(2√3+3)(2√3-3)
x=(24-12√3+10√3-15)/(12-9)
x=(9-2√3)/3=a
b]
0=(2√3+3)x-3√3-5
x(2√3+3) =3√3+5
x=(3√3+5)(2√3-3) /(3√3+5)(3√3-5)
x=(18-9√3+10√3-15) / ( 27-25)
x=(3+√3) /2 =b
10a]
-(-5-√3)x+1-2√3=0
(5+√3)x=2√3-1
x=(2√3-1)(5-√3) / (5+√3)(5-√3)
x=(10√3-6-6+√3) /( 25-3)
x=(11√3-12) /22
x=√3/2 -6/11
10b]
(5+√3)x=1-2√3-1+2√3
x=0
11a]
-2=3*3+k
k=-2-9
k=-11
b]
-2=-2/5*3+k
k=-2+6/5
k=-10/5+6/5
k=-4/5
c]
-2=-2*3+k
k=-2+6
k=4
12a]
0=(-2k+4)*0+k-4
0=k-4
k=4
b]
4=(-2k+4)*1+k-4
4=-2k+4+k-4
k=-4
c]
-2=(-2k+4)*(-3) +k-4
-2=6k-12+k-4
-2+16=7k
k=14/7
k=2