Mensah is 5 years old and joyce is thrice as old as mensah. In how many years will joyce be twice as old as Mensah?

If 16 * 2\(^{(x + 1)}\) = 4\(^x\) * 8\(^{(1 - x)}\), find the value of x.

The circumference of a circular track is 9km. A cyclist rides round it a number of times and stops after covering a distance of 302km. How far is the cyclist from the starting point?

Simplify 2√7- \(\frac{14}{√7} + \frac{7}{√21}\)

If 4x+2y=16 and 6x-2y=4 , find the value of (y-x).