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

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

Find the value of x if x^2+5x+6=0

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

(a) Find the value of x if 1 + 6 + 11 + ... + x = 189. (b) Find the value of x if 3 + 6 + 9 + ... + 96 = x.

Find the values of x, if (i) |{:(2,4),(5,1):}|=|{:(2x,4),(6,x):}| (ii) |{:(2,3),(4,5):}|=|{:(x,3),(2x,5):}|

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

If x=2 and y=5 find the values of : 3x-4y

Find the values of x for which f(x) is positive if f(x)=(x^(2)-6x+5)/(x^(2)-5x+6) .

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

Find the value of a, if x -2 is a factor of 2x^5- 6x^4 -2ax^3+ 6ax^2+ 4ax + 8.