Question 43555
sqrtx~3=8 or squaring both sides we get x~3=64 or x=4 

proof sqrt4*4*4=8 sqrt64=8 or 8=8 

3sqrtx~2=4 or 3sqrt(x*x)=4  3*x=4 or x=4/3

proof 3sqrt4/3*4/3=4 or 3*4/3=4 or 12/3=4 or 4=4