3(x – 7) – x = 2x – 21

Answer 1

Let's solve this equation step by step:

3(x - 7) - x = 2x - 21

First, distribute the 3 to both terms inside the parentheses:

3x - 21 - x = 2x - 21

Combine like terms on the left side of the equation:

2x - 21 = 2x - 21

Now, subtract 2x from both sides of the equation:

-21 = -21

Since the equation has the same value on both sides, it is true for all values of x. This means that the equation has infinitely many solutions.