Question

4. If 4x + 3 = 15, then 2x – 3=?​

Answer 1

To find : value of $2x - 3$

Given : $4x + 3 =15$

Solution :

• According to question we have to find the value of  $2x - 3$  when $4x + 3 =15$  .

• Therefore , firstly we find the value of $x$ from $4x + 3 =15$ using transposition method .  

• $4x + 3 =15$  

        $4x = 15 -3 \\4x = 12 \\x = 3$

• Now , substituting the value of  $x$ in the expression $2x - 3$  to find its value .  

• $2x - 3$  

       $= 2 ( 3 ) - 3 \\= 6 -3 \\=3$

Hence , value of $2x - 3$  is $3$ .

Answer 2

Answer:

The value of $2x-3$ is $3$.

Step-by-step explanation:

Given : $4x+3=15$

To find : The value of $2x-3$.

Solution :

• The given expression is,

         $4x+3=15$

• We have to find the value of $2x-3$.
• First, we have to find the value of $x$.
• The equation is,

        $4x+3=15$

• Transpose $3$ to other side, we get

           ∴ $4x=15-3$

           ∴ $4x=12$

• Transpose $4$ to other side, we get

           ∴ $x=\frac{12}{4}$

           ∴ $x=3$

• ∴ The value of $x$ is $3$.
• Now,

      $2x-3=2*3-3$

               = $6-3$

               = $3$

• ∴ The value of $2x-3$ is $3$.