Question

If 20/28=x/21, then the value of x is​

Answer 1

Answer:

The value of $x$ in given expression is $15$.            

Step-by-step explanation:

Given : $\frac{20}{28} = \frac{x}{21}$

To find : The value of $x$.

Solution :

• It is given that $\frac{20}{28} = \frac{x}{21}$.
• Here, we have to find the value of $x$.
• The given example is in the fraction number format.
• We have to do cross multiplication and solve further to find the value of $x$.
• The equation is,

        $\frac{20}{28} = \frac{x}{21}$

• On cross multiplication, the equation becomes

      $20*21=28x$

        ∴ $420=28x$

          ∴ $x=\frac{420}{28}$

          ∴ $x=15$      

• ∴ The value of $x$ in given expression is $15$.                                                                                                                                                                                                                                                                                                                                                                                                                                        

Answer 2

• As per the data given in the question, we have to find the value of the expression.

           Given data:- $\frac{20}{28} =\frac{x}{21} .$  

           To find:- Value of the expression  

           Solution:-  

• Here, we will use the below following steps to find a solution using the transposition method:

• Step 1:- we will Identify the variables and constants in the given simple equation.

• Step 2:-then we Simplify the equation in LHS and RHS.

• Step 3:- Transpose or shift the term on the other side to solve the equation further simplest.

• Step 4:- Simplify the equation using arithmetic operation as required that is mentioned in rule 1 or rule 2 of linear equations.

• Step 5:- Then the result will be the solution for the given linear equation. By using the transposition method. we get,

             $\frac{20}{28} =\frac{x}{21} \\\Rightarrow \frac{5}{7}=\frac{x}{21}\\\Rightarrow 21 \times \frac{5}{7}=x\\\Rightarrow x=15.$

       Hence we will get the value $x=15.$