Question

Form an equation and solve: Half of a number is 21 less than twice the number..​

Answer 1

Answer:

x=14

Step-by-step explanation:

x/2=2x-21

21=2x-x/2

21=4x-x/2

21=3x/2

7=x/2

x=14

Answer 2

Let the number be $x$

According to the question,

Half of a number is $21$ less than twice the number

$\frac{x}{2}=2x-21$ __________(1)

From this equation we have to find the number

$\frac{x}{2}=2x-21$

$x=2(2x-21)$

$x=4x-42$

$4x-x=42$

$3x=42$

$x= \frac{42}{3}$

$x= 14$

Therefore, the number is $14$.