8(x+2,5)-2=10x
8x+20-2=10x
-2x=2-20
-2x=-18
x=9
9+2,5=11,5
9,7−11+(-5,42k)=2+9,7−5,82k
5,82k-5,42k=2+9,7 - 9,7 + 11
0,4k = 13
4k = 130
k = 32,5
T^2-4T+3=0
T1=3
T2=1
Log2X=3
X1=8
Log2x=1
X2=2