=>Liz plays puzzle everyday.
 

24/x÷8/3=3/5

24/x×3/8=3/5

3/x×3=3/5

9/x=3/5

3x=45

x=15

Vậy x=15

x(x-2)-3x+6=0

<=>x(x-2)-3(x-2)=0

<=>(x-2)(x-3)=0

<=>*x-2=0                *x-3=0

         x=2                      x=3

=9x^2 +6x +1 -x^2 -x +5

=8x^2 +5x +6

..............

(x-1/2)^2=2^3:2

(x-1/2)^2=2^2

x-1/2=2 hoặc x-1/2=-2

TH1:x-1/2=2

        x=5/2

TH2:x-1/2=-2

        x=-3=2

Vậy x =5/2 hoặc x=-3/2

5/2+3/2x=0,5

5/2+3/2x=1/2

5+3x=1

3x=-4

x=-4/3

x-4/3=5/3

x=5/3+4/3

x=9/3

x=3

Vậy x=3