Question

solve 1/81 +1/91=x/101 find the value of x​

Answer 1

Solve 1/81 +1/91 = x/101 and Find the value of X.

Step-by-step explanation:

The given equation is 1/81 + 1/91 = X/101

                ⇒ $\frac{1}{81}$ + $\frac{1}{91}$ = $\frac{x}{101}$

                ⇒ 91+81 / 91 × 81 = X/101

Solving,

               [ 91 × 81 = 7371 ]

               [ 91 + 81 =  172 ]

               ⇒ 172 / 7371 = X / 101

               ⇒ X = 172 / 7371 × 101

                       = 0.02333 × 101

                       = 2.356

Therefore, the value of X is 2.356

Answer 2

Given:

The equation is : 1/8!  1/9!= x/10!

To find:

The value of x.

Solution:

The given equation in the question is: 1/8! + 1/9! = x/10!

Factorial of a number n = n* (n-1) *(n-2) *..... *2 *1

On adding 1/8! and 1/9! , the equation becomes as follows:

9+1 / 9! = x/10!

On solving we get:

10 / 9! = x / 10!

Now bringing x to one side and putting all the other values on the other side we get:  

x = 10 / 9!× 10!

 = 10*10

Calculating this we get:

x  = 100

Therefore, the value of x  as calculated with the help of the equation given in the question is 100.