If `2x + 10 = 40`, find the value of x

If 2x+10 = 40 , then find the value of x .

Find the value of (x+a)(x-10)

If the sum of the squares of zeroes of the quadratic polynomial f(x) = x^(2) - 8x + k is 40, find the value of k.

if 2x-2y=10 find the value of x-y

If 2x+5=10 then find the value of x

If 4x^2+y^2=40\ a n d\ x y=6,\ find the value of 2x+ydot

If 4x^2+y^2=40\ and x y=6 , find the value of 2x+y

If 20% of x+40% of (x)/(2)+20% of 3x=100 , then find the value of x.

If tan 40^(@)=x , find the value of (i) sec^(2)40^(@)" " (ii) 1+cosec^(2)50^(@)