Question

solve the equation:-
21 - 3(x - 7) = x + 20
​

Answer 1

Answer:

21-3(x-7)=x+20

21-3x+21=x+20

42-3x=x+20

42-20=x+3x

22=4x

x=22/4

Hope it helps you.

Thank you.

Answer 2

Answer:

=> The value of x is $\frac{11}{2}$.

Step-by-step explanation:

Given that:-

$21 - 3(x - 7) = x + 20$

To find:- The value of the expression,

To find the value of x, we must follow the transposition method:

As we have,

=> $21 - 3(x - 7) = x + 20$

By distributing the terms, we get

=> $21 - 3x - 21 = x + 20$

Add the numbers, we get

=> $42-3x = x + 20$

Now rearrange the terms, we get

=> $-3x+42 = x + 20$

Subtract $42$ from both sides,

=> $-3x+42 -42= x + 20-42$

=> $-3x = x - 22$

Subtract $x$ from both sides, we get

=> $-3x -x= x - 22-x$

=> $-4x =-22$

Divide both sides by $-4$,

=> $x = \frac{-22}{-4}$

Canceling the terms,

=> $x = \frac{11}{2}$

Hence, the required solution is $\frac{11}{2}$.