what dose this problem equal?

Question

5(i+4)=40

 

Answer 1

We have a couple of ways to start off. We can either distribute the 5 to the i + 4, or we can divide both sides by 5. For simplicity's sake, we'll go with the division way:

5(i + 4) / 5 = 40 / 5

i + 4 = 8

 

Now to complete the variable isolation, we need to subtract 4 from both sides:

i + 4 - 4 = 8 - 4

i = 4

 

We can check our work:

5(4 + 4) = 40

5 * 8 = 40

40 = 40