Question

The solution of the equation 5x=2x + 21 is a)7 b)1/7 c)-7 d)-1/7​

Answer 1

Answer:

x=7

Step-by-step explanation:

Given equation,

5x=2x+21

transpose 2x to left hand side

5x-2x=21

3x=21

transpose 3 to RHS

x=21/3

x=7.

Answer 2

Answer:

=> The correct answer is option (a) 7

Step-by-step explanation:

Given that:-

$5x=2x + 21$

To find:- The value of the expression,

We must use the transposition method to determine the value of x:

As we have,

=> $5x=2x + 21$

Now, subtract both sides by $2x$:

=> $5x-2x=2x + 21-2x$

Simplifying it further, we get

=> $3x=21$

Divide both sides by $3$,

=> $x = 7$

Hence, the required solution is 7