Question

26. If x:3 = 12:x, calculate the positive value of x.​

Answer 1

x = 6

Explanation:

Express the ratio in fractional form, that is

`(x)/(3)` =
`(12)/(x)` ( cross- multiply )

x² = 36 ( take the square root of both sides )

x = ±
`√(36)` = ± 6

Thus x = 6 is the positive value

Answer 2

Answer ::+-6

Explanation:

x:3=12:x

or, x/3 = 12/x

Doing cross multiplication,

x^2=36

Putting sqare root on both sides,

x= sqrt. 36

x= +- 6

Therefore x=+-6.