1.Find the value of x if 5:x=3:12

Find the value of x , if x :6::5:3

Find the value of 3x^2-5x+8 for x=3

5 2/ 3 -x 5/6 = 2 . Find the value of x .

Find the value of x if A= |(3x, 2), (5x,1)| if |A|= 5

Find the value of x if [[x+2,0],[3,5]]=[[5,0],[3,5]]

The equation 3x^(2)-12x+(n-5)=0 has repeated roots. Find the value of of n.

The mean of 2,12,4,9, 5 and 16 is x . The median of 4,3, x, x-1, 12 and 16 is y. Find the value of x and y.

Find the values of x and y , if 2 x + 3yi = 2+ 12i , where x, y in R

Find the value of x - (2-3x)/4+(3-2x)/5=2-x

Find the value of x , if [(3x+y,-y),(2y-x,3)]=[(1, 2),(-5, 3)] .