Question

Twice an integer is five less than 21

Answer 1

By making an equation, we can solve this problem.

First, we need to establish our variable.  Let's call our unknown integer "x"

So, 2 times an integer can be represented by 2x So, that is (means equal to) 5 less than 21.

5 Less than 21 is 21-5.

So,

2x = 21-5

Now, just solve the equation for x.

2x = 16

x = 8

The integer you described is 8.

Hope this helps!