If 2x -7=21, what is the value of x?

Answer 1

First, we want to isolate x on one side of the equal sign. We can do this by adding 7 to both sides:

2x - 7 + 7 = 21 + 7

Simplifying:

2x = 28

Now we want to solve for x. We can do this by dividing both sides by 2:

2x/2 = 28/2

Simplifying:

x = 14

Therefore, the value of x is 14.