Question

Find the value of x : 5x + 15 = 3x + 21​

Answer 1

Given-: 5x + 15 = 3x + 21

Find -: Value of x

Solution-:

5x + 15 = 3x + 21

5x - 3x = 21 - 15

2x = 6

x = 6/2

x = 3

Hence, required value of x is 6.

Answer 2

Answer:

The value of x will be $=3$

Step-by-step explanation:

In accordance with the information provided in the question,

We have find the value of the supplied expression in the above question.

Given the data in question 5x + 15 = 3x + 21​

We have find the value of x in above equation

Here we will use the transposition method

Hence, for solving the above equation, we will solve it by separating the like terms at one side to other side,

So, we will shift 15 from LHS to RHS the sign will change from positive to negative,

So, we will shift 3x from RHS to LHS the sign will change from positive to negative,

As we get,

$5x+15=3x+21\\5x-3x=21-15\\2x=6$

Divide both side by 2 we get

$\frac{2x}{2} =\frac{6}{2} \\x=3$

Hence the value of x will be $=3$